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Fight to protect natural resources has become too dangerous in the face of violence from state forces, private security groups and state-sponsored vigilantes, say groups from 29 countries across Africa, Latin America and Asia

Land rights defenders from 29 countries have written to the UN asking it to act against violent corporate and state-sponsored groups which they say are threatening their lives and trashing the environment.

Thirty nine grassroots groups from Africa, Latin America and Asia, many of whose leaders have been killed or forced to flee for protesting the theft of land, big dams mines and forest destruction, say their fight to protect natural resources is becoming too dangerous.

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Evolutionary biologist Matthew Cobb unpicks a lecture that, sixty years ago, set the course for the genetic revolution.

Pumpkin toadlet frogs are only known case of an animal that continues to make a communication signal even after the target audience has lost the ability to hear it

Humans trying to chat each other up in a noisy nightclub may find verbal communication futile. But it appears even more pointless for pumpkin toadlets after scientists discovered that females have lost the ability to hear the sound of male mating calls.

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Blanchland, North Pennines Seemingly in a trance, the reptile lay outstretched on the road with predator bites near its head

When I was a child there was a sheet of rusting corrugated iron lying on the sunny bank of my grandmother’s allotment. If I lifted it quickly I could often find a slowworm resting underneath. It would lie there, startled by the sunlight for a moment, then glide away, like a flowing column of mercury, into the hedge.

I have been an inveterate lifter of rusty corrugated iron sheets ever since, but although they are well recognised hiding places for these elegant reptiles I’ve rarely been lucky.

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Rob Vertessy, who retired as the BOM’s director in 2016, has hit back at ‘time wasters’ and ‘amateurs’ who are given a forum by the Australian

For Rob Vertessy, the attacks on his government agency became tedious and time-consuming and no less irritating because they were coming from a motivated group of “amateurs”.

Vertessy spent a decade at Australia’s Bureau of Meteorology. He retired in April 2016 after five years as the agency’s director.

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Rob Vertessy says attacks such as the claim the bureau was ‘fabricating temperature records’ are dangerous and wrong

Misleading attacks on Australia’s Bureau of Meteorology by climate deniers in the Australian are “debilitating” to the agency and limiting its ability to predict risks and protect the community, the former head of the bureau has told the Guardian.

Rob Vertessy, who retired as director of the BoM in April 2016, said climate deniers’ attempts to confuse the public about the science of climate change were dangerous, in an interview for the Guardian’s Planet Oz blog.

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A UNSW-built "solar sedan" is taking on a Brisbane-built solar sports coupe in a race across Australia – and to drive as registered vehicles on Australian roads.

Australian institutional investors have a strong appetite for low carbon assets, but policy uncertainty and a lack of scalable deals are major barriers.

In the eye of the storm over energy policy is Liddell, an ageing coal-fired power station owned by energy giant AGL.

Prime Minister Malcolm Turnbull has twisted the arm of AGL chief executive Andy Vesey to take to the company’s board the proposition that it should extend the plant’s life beyond its scheduled 2022 closure, or alternatively sell it to an operator that would carry it on.

AGL chief economist Tim Nelson says the company is running the rule over both options but he argues preserving the power station may not be the best solution. “The decision is not just economic, it is also also a commitment on carbon risk.”

Nelson says the emissions profile of extending the life of coal-fired power stations is inconsistent with current commitments in AGL’s greenhouse gas policy and the government’s undertakings under the Paris climate accord. Add to that the hefty rehabilitation costs for 50-year-old Liddell and it seems “the numbers don’t add up”.

While AGL is reviewing government options, it is so far sticking to its alternatives for the site – repurposing it, or repowering it with zero-emissions technology.

But without a coherent policy framework it is hard to see an orderly transition in the energy market. Nelson says a clean energy target could fix the uncertainty, encouraging the replacement of old technology with a combination of renewables and “complementary capacity from flexible sources”.

Michelle Grattan does not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and has disclosed no relevant affiliations beyond the academic appointment above.

Garnaut says renewables will cut energy costs to Whyalla steelworks by at least a third, and outlines plans for large scale solar, rooftop solar and pumped hydro and battery storage.

Large-scale power project construction work has broken through 10,000 jobs and rooftop solar installs almost broke 100MW for the month. Given they’ll deliver something close to $180m in bill savings the large lift in solar shouldn’t come as much surprise to anyone but Tony Abbott.

Commonwealth Bank shareholders Guy and Kim Abrahams have discontinued their Federal Court proceedings against the bank for failing to disclose climate change risks in annual reports.

Infigen Energy announces announces who will be appointed to the Boards of Infigen Energy Limited, Infigen Energy (Bermuda) Limited and Infigen Energy RE Limited (the Infigen Boards).

The race is on for storage solutions that can help provide secure, reliable electricity supply as more renewables enter Australia’s electricity grid.

The travelling stock routes are a precious national resource. Author provided

Since the 19th century, Australian drovers have moved their livestock along networks of stock routes. Often following traditional Indigenous pathways, these corridors and stepping-stones of remnant vegetation cross the heavily cleared wheat and sheep belt in central New South Wales.

The publicly owned Travelling Stock Reserve network of New South Wales is now under government review, which could see the ownership of much of this crown land move into private hands.

But in a study published today in the Australian Journal of Botany we suggest that privatising stock routes may endanger vital woodlands and put vulnerable species at risk.

Read more: How ancient Aboriginal star maps have shaped Australia’s highway network

The review will establish how individual reserves are currently being used. Although originally established for graziers, the patches of bush in the network are now more likely to be used for recreation, cultural tourism, biodiversity conservation, apiary and drought-relief grazing.

This shift away from simply moving livestock has put pressure on the government to seek “value” in the network. The review will consider proposals from individuals and organisations to buy or acquire long-term leases for particular reserves.

It is likely that most proposals to purchase travelling stock reserves would come from existing agricultural operations.

A precious national resource

Travelling stock reserves across New South Wales represent some of the most intact examples of now-endangered temperate grassy woodland ecosystems.

Our research found that changing the status or use of these reserves could seriously impact these endangered woodlands. They criss-cross highly developed agricultural landscapes, which contain very limited amounts of remnant vegetation (areas where the bush is relatively untouched). Travelling stock reserves are therefore crucially important patches of habitat and resources for native plants and animals.

This isn’t the first time a change in ownership of travelling stock reserves has been flagged. Over the last century, as modern transport meant the reserves were used less and less for traditional droving, pressure to release these areas for conventional agriculture has increased.

Historic stock routes are still used for grazing cattle. Daniel Florance, Author provided

To understand what a change in land tenure might mean to the conservation values of these woodlands, we spent five years monitoring vegetation in stock reserves in comparison to remnant woodlands on private farmland.

We found that travelling stock reserves contained a higher number of native plant species, more native shrubs, and less exotic plants than woodland remnants on private land.

The higher vegetation quality in travelling stock reserves was maintained over the five years, which included both the peak of Australia’s record-breaking Millennium Drought and the heavy rainfall that followed, referred to as the “Big Wet”.

The take-home message was that remnant woodland on public land was typically in better nick than in private hands.

Importantly, other studies have found that this high-quality vegetation is critical for many threatened and vulnerable native animals. For example, eastern yellow robins and black-chinned honeyeaters occur more frequently in places with more shrubs growing below the canopy.

The vulnerable superb parrot also uses travelling stock reserves for habitat. Damian Michael, Author provided

The contrast we saw between woodlands in travelling stock reserves and private land reflects the different ways they’re typically managed. Travelling stock reserves have a history of periodic low-intensity grazing, mostly by cattle, with long rest periods. Woodland on active farms tend to be more intensively grazed, by sheep and cattle, often without any strategic rest periods.

The stock reserves’ future

The uncertain future of travelling stock reserves casts doubt on the state of biodiversity across New South Wales.

The current review of travelling stock reserves is considering each reserve in isolation. It flies in the face of the belief of many managers, practitioners and researchers that the true value of these reserves is in the integrity of the entire network – that the whole is greater than the sum of its parts.

Travelling stock reserves protect threatened species, allow the movement of wildlife, are seed sources for habitat restoration efforts, and support the ecosystem of adjacent agricultural land. These benefits depend on the quality of the remnant vegetation, which is determined by the grazing regime imposed by who owns and manages the land.

Of course, not all travelling stock reserves are in good condition. Some are subject to high-intensity livestock grazing (for example, under longer-term grazing leases) coupled with a lack of funding to manage and enhance natural values.

Changing the land tenure status of travelling stock reserves risks increasing grazing pressure, which our study suggests would reduce ecosystem quality and decrease their conservation value.

The travelling stock routes are important parts of our ecosystem, our national heritage, and our landscape. They can best be preserved by remaining as public land, so the entire network can be managed sustainably.

This requires adequate funding for the Local Land Services, so they can appropriately manage pest animals, weeds, erosion and illegal firewood harvesting and rubbish dumping.

Travelling stock reserves are more than just The Long Paddock – they are important public land, whose ecological value has been maintained under public control. They should continue to be managed for the public good.

Luke S. O'Loughlin has received funding from the Hermon Slade Foundation and the Holsworth Wildlife Endowment Fund

Damian Michael receives funding from the Australian Government (National Environmental Science Program) and the Murray Local Land Services

David Lindenmayer receives funding from the Australian Research Council, the Australian Government (National Environmental Science Program), the Ian Potter Foundation, the Vincent Fairfax Family Foundation, the Murray Local Land Services and the Riverina Local land Services

Thea O'Loughlin received funding from the Murray Local Land Services.

Advisian has appointed Tony Frencham as global director for new energy as it announces plans to scale significantly within the next five years.

The people of the Guna Yala archipelago, off the Panama coast, may be among the first island communities to leave their homes and move onshore.

In this photo essay, photographer Clayton Conn shares his experience of the Mexico City earthquake.

Community debate has been raging in the popular NSW coastal town of Port Macquarie over the local council's decision to bury a dead 12-metre, 18-tonne humpback whale on Nobbys Beach.

The race is on for storage solutions that can help provide secure, reliable electricity supply as more renewables enter Australia’s electricity grid.

With the support of the Australian Renewable Energy Agency (ARENA), we have identified 22,000 potential pumped hydro energy storage (PHES) sites across all states and territories of Australia. PHES can readily be developed to balance the grid with any amount of solar and wind power, all the way up to 100%, as ageing coal-fired power stations close.

Solar photovoltaics (PV) and wind are now the leading two generation technologies in terms of new capacity installed worldwide each year, with coal in third spot (see below). PV and wind are likely to accelerate away from other generation technologies because of their lower cost, large economies of scale, low greenhouse emissions, and the vast availability of sunshine and wind.

New generation capacity installed worldwide in 2016. ANU/ARENA, Author provided

Although PV and wind are variable energy resources, the approaches to support them to achieve a reliable 100% renewable electricity grid are straightforward:

• Energy storage in the form of pumped hydro energy storage (PHES) and batteries, coupled with demand management; and

• Strong interconnection of the electricity grid between states using high-voltage power lines spanning long distances (in the case of the National Electricity Market, from North Queensland to South Australia). This allows wind and PV generation to access a wide range of weather, climate and demand patterns, greatly reducing the amount of storage needed.

PHES accounts for 97% of energy storage worldwide because it is the cheapest form of large-scale energy storage, with an operational lifetime of 50 years or more. Most existing PHES systems require dams located in river valleys. However, off-river PHES has vast potential.

Read more: How pushing water uphill can solve our renewable energy issues.

Off-river PHES requires pairs of modestly sized reservoirs at different altitudes, typically with an area of 10 to 100 hectares. The reservoirs are joined by a pipe with a pump and turbine. Water is pumped uphill when electricity generation is plentiful; then, when generation tails off, electricity can be dispatched on demand by releasing the stored water downhill through the turbine. Off-river PHES typically delivers maximum power for between five and 25 hours, depending on the size of the reservoirs.

Most of the potential PHES sites we have identified in Australia are off-river. All 22,000 of them are outside national parks and urban areas.

The locations of these sites are shown below. Each site has between 1 gigawatt-hour (GWh) and 300GWh of storage potential. To put this in perspective, our earlier research showed that Australia needs just 450GWh of storage capacity (and 20GW of generation power) spread across a few dozen sites to support a 100% renewable electricity system.

In other words, Australia has so many good sites for PHES that only the best 0.1% of them will be needed. Developers can afford to be choosy with this significant oversupply of sites.

Pumped hydro sites in Australia. ANU/ARENA, Author provided

Here is a state-by-state breakdown of sites (detailed maps of sites, images and information can be found here):

NSW/ACT: Thousands of sites scattered over the eastern third of the state

Victoria: Thousands of sites scattered over the eastern half of the state

Tasmania: Thousands of sites scattered throughout the state outside national parks

Queensland: Thousands of sites along the Great Dividing Range within 200km of the coast, including hundreds in the vicinity of the many wind and PV farms currently being constructed in the state

South Australia: Moderate number of sites, mostly in the hills east of Port Pirie and Port Augusta

Western Australia: Concentrations of sites in the east Kimberley (around Lake Argyle), the Pilbara and the Southwest; some are near mining sites including Kalgoorlie. Fewer large hills than other states, and so the minimum height difference has been set at 200m rather than 300m.

Northern Territory: Many sites about 300km south-southwest of Darwin; a few sites within 200km of Darwin; many good sites in the vicinity of Alice Springs. Minimum height difference also set at 200m.

The maps below show synthetic Google Earth images for potential upper reservoirs in two site-rich regions (more details on the site search are available here). There are many similarly site-rich regions across Australia. The larger reservoirs shown in each image are of such a scale that only about a dozen of similar size distributed across the populated regions of Australia would be required to stabilise a 100% renewable electricity system.

Araluen Valley near Canberra. At most, one of the sites shown would be developed. ANU/ARENA, Author provided Townsville, Queensland. At most, one of the sites shown would be developed. ANU/ARENA, Author provided

The chart below shows the largest identified off-river PHES site in each state in terms of energy storage potential. Also shown for comparison are the Tesla battery and the solar thermal systems to be installed in South Australia, and the proposed Snowy 2.0 system.

Largest identified off-river PHES sites in each state, together with other storage systems for comparison. ANU/ARENA, Author provided

The map below shows the location of PHES sites in Queensland together with PV and wind farms currently in an advanced stage of development, as well as the location of the Galilee coal prospect. It is clear that developers of PV and wind farms will be able to find a PHES site close by if needed for grid balancing.

Solar PV (yellow) and wind (green) farms currently in an advanced stage of development in Queensland, together with the Galilee coal prospect (black) and potential PHES sites (blue). ANU/ARENA, Author provided

Annual water requirements of a PHES-supported 100% renewable electricity grid would be less than one third that of the current fossil fuel system, because wind and PV do not require cooling water. About 3,600ha of PHES reservoir is required to support a 100% renewable electricity grid for Australia, which is 0.0005% of Australia’s land area, and far smaller than the area of existing water storages.

PHES, batteries and demand management are all likely to have prominent roles as the grid transitions to 50-100% renewable energy. Currently, about 3GW per year of wind and PV are being installed. If this continued until 2030 it would be enough to supply half of Australia’s electricity consumption. If this rate is doubled then Australia will reach 100% renewable electricity in about 2033.

Fast-track development of a few excellent PHES sites can be completed in 2022 to balance the grid when Liddell and other coal-fired power stations close.

Andrew Blakers receives funding from the Australian Renewable Energy Agency

Matthew Stocks receives funding from the Australian Renewable Energy Agency for R&D projects on solar photovoltaics and integration of renewable energy. He owns shares in Origin Energy.

Bin Lu does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond the academic appointment above.