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Once upon a time political divisions on energy policy would have had a significant impact on the renewable energy market. This time, however, it has been largely ignored.

While it may take decades yet for renewables to become the dominant form of generation globally, their presence today is permanent, economically rational and their advance inevitable.

Tritium unveiled new facility that will lift manufacturing of EV charging stations 7-fold, while QLD government unveils its long term EV strategy.

Greens unveil plan for 20GW of energy storage by 2030, providing incentives for storage at household and grid level, and try to move the energy debate beyond the limited scope of baseload vs renewables.

How a British observatory played a crucial part in the Cold War.

energy.gov.au provides a starting point to find energy information from a range of Australian sources. Find practical advice for your home or business as well as government energy priorities.

Pheasants are the bird species most likely to be run over on UK roads, according to new research.

Donald Trump has made his first visit to Puerto Rico since the US territory was pummelled by Hurricane Maria nearly two weeks ago. Shortly after landing in San Juan, the president praised his administration’s response, said the island’s leaders should be “very proud” of the low official death toll – and appeared to complain at the cost of the recovery effort. The island’s 3.4 million residents are still largely without electricity, communications and access to clean drinking water and food

Puerto Rico: Trump praises 'great job we've done' in visit to stricken island

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The International Energy Agency (IEA) may be underestimating Australian household energy bills by 25% because of a lack of accurate data from the federal government.

The Paris-based IEA produces official quarterly energy statistics for the 30 member nations of the Organisation for Economic Cooperation and Development (OECD), on which policymakers and researchers rely heavily. But to provide this service, the IEA relies on member countries to provide it with good-quality data.

Last month, the agency published its annual summary report, Key World Statistics, which reported that Australian households have the 11th most expensive electricity prices in the OECD.

Read more: FactCheck: Are Australians paying twice as much for electricity as Americans?

But other studies – notably the Thwaites report into Victorian energy prices – have reported that households are typically paying significantly more than the official estimates. In fact, if South Australia were a country it would have the highest energy prices in the OECD, and typical households in New South Wales, Queensland or Victoria would be in the top five.

A spokesperson for the federal Department of Environment and Energy, the agency responsible for providing electricity price data to the IEA, told The Conversation:

Household electricity prices data for Australia are sourced from the Australian Energy Market Commission annual Residential electricity price trends report. The national average price is used, with GST added. It is a weighted average based on the number of household connections in each jurisdiction.

The Australian energy statistics are the basis for the Australia data reported by the IEA in their Key world energy statistics. The Department of the Environment and Energy submits the data to the IEA each September. Some adjustments are made to the AES data to conform with IEA reporting requirements.

But it is clear that the electricity price data for Australia published by the IEA is at least occasionally of poor quality.

The Australian household electricity series in the IEA’s authoritative Energy Prices and Taxes quarterly statistical report stopped in 2004, and only resumed again again in 2012.

Between 2012 and 2016, the IEA’s reported residential price series data for Australia showed no change in prices.

Yet the Australian Bureau of Statistics’ electricity price index, which is based on customer surveys, showed a roughly 20% increase in the All Australia electricity price index over this period.

Australia is also the only OECD nation not to report electricity prices paid by industry.

Current prices

This year’s reported household average electricity prices are almost certainly wrong too. The IEA reports that household electricity prices in Australia for the first quarter of 2017 were US20.2c per kWh.

At a market exchange rate of US79c to the Australian dollar, this puts Australian household electricity prices at AU28c per kWh. Adjusted for the purchasing power of each currency, the comparable price is AU29c per kWh.

By contrast, the independent review of the Victorian energy sector chaired by John Thwaites surveyed the real energy prices paid by customers, as evidenced by their bills. In a sample of 686 Victorian households, those with energy consumption close to the median value were paying an average of AU35c per kWh in the first quarter of 2017. This is 25% more than the IEA’s official estimate. At least part of this difference is explained by the AEMC’s assumption that all customers in a competitive retail market are supplied on their retailers’ cheapest offers. But this is not the case in reality.

Surveying real electricity and gas bills drastically reduces the range of assumptions that need to be made to estimate the price paid by a representative customer. Indeed, as long as the sample of bills is representative of the population, a survey based on actual bills produces a reliable estimate of representative prices in retail markets characterised by high levels of price dispersion, as Australia’s retail electricity markets are.

Read more: Baffled by baseload? Dumbfounded by dispatchables? Here’s a glossary of the energy debate

Pointing to a reliable estimate of Victoria’s representative residential price is, of course, not enough to prove that the IEA’s estimate is wrong. It could just as easily mean that Victorians are paying way more than the national average for their electricity.

But the idea that Victorians are paying more than average does not stack up when we look at the state-by-state data, which suggests that Victoria is actually somewhere in the middle. Judging by the prices charged by the three largest retailers in each state and territory, Victorian householders are paying about the same as those in New South Wales and Queensland, less than those in South Australia, and more than those in Tasmania, the Northern Territory, Western Australia and the Australian Capital Territory.

Residential electricity prices. Author provided

The IEA can not reasonably be blamed for the inadequate residential data for Australia that they report, and the nonexistent data on electricity prices paid by Australia’s industrial customers. The IEA does not do its own calculation of prices in each country, but rather it relies on price estimates from official sources in those countries.

An obvious question that arises from this is where Australia really ranks internationally if we used prices that reflect what households are actually paying.

This is contentious, not least because prices in New South Wales, Queensland and South Australia increased – typically around 15% or more – from July this year. We do not know how prices have changed in other OECD member countries since the IEA’s recent publication (which covered prices for the first quarter of 2017). But we do know that prices in Australia have been far more volatile than in any other OECD country.

Assuming that other countries’ prices are roughly the same as they were in the first quarter of 2017, our estimate using the IEA’s data is that the typical household in South Australia is paying more than the typical household in any other OECD country. The typical household in New South Wales, Queensland or Victoria is paying a price that ranks in the top five.

It should also be remembered that these prices are after excise and sale tax. Taxes on electricity supply in Australia are low by OECD standards – so if we use pre-tax prices, Australian households move even higher up the list.

There are serious question marks over Australia’s official electricity price reporting. Policy makers, consumers and the public have a right to expect better.

Bruce Mountain is a cofounder of MarkIntell, which is owned and operated by Carbon and Energy Markets and provides energy retail market data (including data used in this article) for use by regulators and governments in Australia.

On the prowl in the outback. Hugh McGregor/Arid Recovery, Author provided

Cats kill more than a million birds every day across Australia, according to our new estimate – the first robust attempt to quantify the problem on a nationwide scale.

By combining data on the cat population, hunting rates and spatial distribution, we calculate that they kill 377 million birds a year. Rates are highest in Australia’s dry interior, suggesting that feral cats pose a serious and largely unseen threat to native bird species.

Read more: Ferals, strays, pets: how to control the cats that are eating our wildlife

This has been a contentious issue for more than 100 years, since the spread of feral cats encompassed the entire Australian mainland. In 1906 the ornithologist A.J. Campbell noted that the arrival of feral cats in a location often immediately preceded the decline of many native bird species, and he campaigned vigorously for action:

Undoubtedly, if many of our highly interesting and beautiful birds, especially ground-loving species, are to be preserved from total extinction, we must as a bird-lovers’ union, at no distant date face squarely a wildcat destruction scheme.

His call produced little response, and there has been no successful and enduring reduction in cat numbers since. Nor, until now, has there been a concerted effort to find out exactly how many birds are being killed by cats.

Counting the cost

To provide a first national assessment of the toll taken by cats on Australian birds, we have compiled almost 100 studies detailing the diets of Australia’s feral cats. The results show that the average feral cat eats about two birds every five days.

We then combined these statistics with information about the population density of feral cats, to create a map of the estimated rates of birds killed by cats throughout Australia.

Number of birds eaten per square kilometre. Brett Murphy, Author provided

We conclude that, on average, feral cats in Australia’s largely natural landscapes kill 272 million birds per year. Bird-kill rates are highest in arid Australia (up to 330 birds per square km per year) and on islands, where rates can vary greatly depending on size.

We also estimate (albeit with fewer data) that feral cats in human-modified landscapes, such as the areas surrounding cities, kill a further 44 million birds each year. Pet cats, meanwhile, kill about 61 million birds per year.

Overall, this amounts to more than 377 million birds killed by cats per year in Australia – more than a million every day.

Which species are suffering?

In a related study, we also compiled records of the bird species being killed by cats in Australia. We found records of cats killing more than 330 native bird species – about half of all Australia’s resident bird species. In natural and remote landscapes, 99% of the cat-killed birds are native species. Our results also show that cats are known to kill 71 of Australia’s 117 threatened bird species.

Birds that feed or nest on the ground, live on islands, and are medium-sized (60-300g) are most likely to be killed by cats.

Galahs are among the many native species being killed by feral cats. Mark Marathon, Author provided

It is difficult to put a million-plus daily bird deaths in context without a reliable estimate of the total number of birds in Australia. But our coarse assessment from many published estimates of local bird density suggests that there are about 11 billion land birds in Australia, suggesting that cats kill about 3-4% of Australia’s birds each year.

However, particular species are hit much harder than others, and the population viability of some species (such as quail-thrushes, button-quails and ground-feeding pigeons and doves) is likely to be especially threatened.

Our tally of bird deaths is comparable to similar estimates for other countries. Our figure is lower than a recent estimate for the United States, and slightly higher than in Canada. Overall, bird killings by cats seem to greatly outnumber those caused by humans.

In Australia, cats are likely to significantly increase the extinction risk faced by some bird species. In many locations, birds face a range of interacting threats, with cat abundance and hunting success shown to increase in fragmented bushland, in areas with high stocking rates, and in places with poorly managed fire regimes, so cat impacts compound these other threats.

Belling the cat

What can be done to reduce the impact? The federal government’s Threatened Species Strategy recognises the threat posed by feral cats, albeit mainly on the basis of their role in mammal extinctions.

The threatened species strategy also prioritised efforts to control feral cats more intensively, eradicate them from islands with important biodiversity values, and to expand a national network of fenced areas that excludes feral cats and foxes.

But while fences can create important havens for many threatened mammals, they are much less effective for protecting birds. To save birds, cats will need to be controlled on a much broader scale.

Read more: The war on feral cats will need many different weapons

We should also remember that this is not just a remote bush problem. Roughly half of Australia’s cats are pets, and they also take a considerable toll on wildlife.

While recognising the many benefits of pet ownership, we should also work to reduce the detrimental impacts. Fortunately, there is increasing public awareness of the benefits of not letting pet cats roam freely. With such measures, cat owners can help to look after the birds in their own backyards, and hence contribute to conserving Australia’s unique wildlife.

We acknowledge the contribution of Russell Palmer (WA Department of Biodiversity Conservation and Attractions), Chris Dickman (University of Sydney), David Paton (University of Adelaide), Alex Nankivell (Nature Foundation SA Inc.), Mike Lawes (University of KwaZulu-Natal), and Glenn Edwards (Department of Environment and Natural Resources) to this article.

John Woinarski has received funding from the Australian government's National Environmental Science Programme (Threatened Speices Recovery Hub).

Brett Murphy has received funding from the Australian government's National Environmental Science Programme (Threatened Speices Recovery Hub).

Leigh-Ann Woolley has received funding from the Australian government's National Environmental Science Programme (Threatened Speices Recovery Hub).

Sarah Legge has received funding from the Australian government's National Environmental Science Programme (Threatened Speices Recovery Hub).

Stephen Garnett has received funding from the Australian government's National Environmental Science Programme (Threatened Speices Recovery Hub).

Tim Doherty receives funding from the Hermon Slade Foundation, Australian Academy of Sciences and Ecological Society of Australia. He is a board member of the Society for Conservation Biology Oceania and member of the Ecological Society of Australia and Australian Mammal Society.

The service industries on which the agricultural sector depends need to modernise the range and quality of the services they provide, writes Dr Jessica Cross. Plus Jason Downes sees strikes as an opportunity to embrace flexibility

After nearly three decades of working in the mining industry and financial sector, I traded my stiletto heels for wellies and went sheep farming. It immediately became apparent that the traditional business model of farming was unsustainable; the reliance on EU subsidies, the volatile and seasonal price of lamb subject to the big supermarkets importing cheap meat, and a wool price that barely covered the cost of shearing. So I applied my City of London background to diversifying my business. From my farm, I now ship locally and internationally a range of luxury wool bedding made from the fleeces of much of the UK’s Southdown pedigreed flock. I also offer disabled-accessible self-catering accommodation for a working farm experience.

The problem with this business model is its dependency on three sectors, whose services I am finding totally inadequate and antiquated, to the point where my entrepreneurial initiative is being undermined.

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They may not be household names, but, according to experts, they pose risks to the environment.

Energy minister Paul Wheelhouse says allowing unconventional extraction of coal and gas would put climate goals at risk

The Scottish government has banned fracking after a consultation found overwhelming public opposition and little economic justification for the industry.

Paul Wheelhouse, the Scottish energy minister, told MSPs that allowing fracking would undermine the government’s ambitions to deeply cut Scotland’s climate emissions, and would lead to unjustifiable environmental damage.

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Rare footage of the capture of wild young elephants in Zimbabwe shows rough treatment of the calves as they are sedated and taken away

The Guardian has been given exclusive footage which shows the capture of young, wild elephants in Zimbabwe in preparation, it is believed, for their legal sale to Chinese zoos.

In the early morning of 8 August, five elephants were caught in Hwange national park by officials at Zimbabwe Parks and Wildlife Management Authority (Zimparks).

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The 2017 Nobel prize in physics has been awarded to three scientists for the detection of gravitational waves.

The fossil of a marine reptile from 199 million years ago gives clues to the diet of baby reptiles.

The Australian Bureau of Statistics estimates 57.5 per cent of ballots in the same-sex marriage postal survey have been mailed back.

Frasers Property Australia has been certified carbon neutral for its business operations and Frasers Property’s Real Utilities has been certified for its electricity and gas products against the National Carbon Offset Standard.

Frasers Property Australia has been certified carbon neutral for its business operations and Frasers Property’s Real Utilities has been certified for its electricity and gas products against the National Carbon Offset Standard.

Major high street retailers back drive to encourage recycling after poll shows more than half throw batteries away in the bin

Major high street retailers have joined forces to encourage people to recycle their used household batteries as a new poll revealed that more than half of respondents admitted they throw them in the bin.

Asda, B&Q, Currys PC World, Marks & Spencer and Morrisons are all backing the drive to make it easier for consumers to recycle dead batteries and avoid millions ending up in landfill every year and wreaking environmental havoc.

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