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Victoria Coalition vote against rise in solar feed in tariff suggests it wants solar to be paid less than brown coal fired generation.

There were signs at COP22 that several countries have begun the long-term planning needed to avoid dangerous climate change.

The Australian and Queensland governments are investing more than $45 million over six years to tackle sediment run-off.

The world needs to produce more food to feed a growing population, but is automation and sensor technology the answer?

Plans to expand Heathrow Airport are set to breach the government’s climate change laws, advisers warn.

South Australia wholesale prices fall below Queensland and NSW, despite some more $14,000/MWh price events engineered by peaking gas plants.

Scientists are warning there’s now so much space debris in low-Earth orbit that action needs to be taken.

A controversial pesticide, linked to a decline in insect species, may soon be banned in Canada.

While much of the media focus at this month’s climate meeting in Marrakech (COP22) was on US President-elect Donald Trump, there were signs that several countries have begun the long-term planning needed to avoid dangerous climate change.

During the conference, four countries – Germany, Canada, Mexico and the United States – presented their 2050 climate plans. Under Article 4 of the Paris Climate Change Agreement, all countries are asked to prepare mid-century, long-term strategies to bring greenhouse gas emissions down to low levels.

A common theme from COP22 was the emphasis on long-term strategies to help guide short-term actions. When launching the 2050 Pathways Platform, Laurence Tubiana, the outgoing French high-level climate champion, stated that if you don’t have a plan for the long term, you can’t know what a good decision is today.

Climate change in 2050

The German Climate Action Plan 2050, approved by the German cabinet this month, foreshadows a reduction in greenhouse gases of up to 95% below 1990 levels by 2050. It covers energy, buildings, transport, industry, agriculture and land use, and sets specific milestones and targets for each sector.

As part of its plan, the German government will set up a commission to work with industry and trade unions on the energy transition to 2050. The commission will consider economic development, structural change and social compatibility to accompany climate action. Australia could also consider such an approach to achieve a just transition to a net zero carbon economy.

The United States Mid-Century Strategy sets out several different pathways by which the United States can cut emissions by at least 80% below 2005 levels by 2050 while maintaining a thriving economy. The pathways portray a transformation to a low-carbon energy system using solar, wind, nuclear, hydro and carbon capture.

Under the plan, nearly all fossil fuel plants without carbon capture are to be phased out by 2050. The plan also shows that the land sector in the United States could sequester 23-45% of economy-wide emissions in 2050 by expanding forests and increasing the carbon stored in croplands and grasslands.

Canada’s long-term plan aims to reduce emissions by 80% or more below 2005 levels by 2050. Mexico will reduce its emissions by 50% from 2000 levels. Both plans outline detailed pathways for achieving these emissions reductions.

To support countries, states, cities and businesses to prepare long-term low-emission plans, the 2050 pathways platform initiative was launched at Marrakech. Already 22 countries have started to formulate 2050 plans, including China and India, as have many states, cities and businesses.

New policies and technology

Developing a long-term plan helps identify the policy measures and technological advancements that are needed now. To this end, Marrakech also hosted the first Low-Emission Solutions Conference associated with a climate congress. The conference brought together technical experts, scientists, academics, business and politicians to brainstorm and exchange information about the technological and policy pathways needed to reach net zero carbon emissions.

The Sustainable Development Solutions Network director, Professor Jeff Sachs, told the conference that we need more than political will to make this transition.

We need to mobilise scientists, engineers and experts to identify what the new energy and economic system will look like and to devise pathways to a net zero carbon economy. This will help businesses to identify risks and opportunities and help governments not to waste money on technologies that are not compatible with the long-term goal.

The four pillars of decarbonisation

The conference highlighted the four basic elements of deep decarbonisation. These also underpin the Australian Deep Decarbonisation Pathway Plan developed by ClimateWorks and ANU.

First, there needs to be ambitious energy efficiency across the economy. This includes “smart grid” technologies, green buildings and greater fuel economy in vehicles.

Second, we need zero-carbon electricity supplied by renewables or a mix of renewables, nuclear and carbon capture and storage. The contributions of each of these to the energy mix will depend on country circumstances and on whether carbon capture can be made commercial.

Third, we need a shift to electrification using zero-carbon electricity. This means using electricity to power vehicles and switching from gas to electricity in homes.

Finally, non-energy emissions are reduced by storing more carbon in forests and land as well as reducing methane, nitrous oxide and fluorinated gases from agriculture, waste and industry.

The Australian government has committed to review its climate policies next year and to consider a long-term emissions reduction target. This is an opportunity for Australia to use these four elements of deep decarbonisation and join other countries in preparing a 2050 deep decarbonisation plan.

Already, South Australia, Victoria, NSW and the ACT have pledged a target of zero net emissions by 2050, with South Australia and the ACT signing the UN’s Under 2MOU (a memorandum between states and regions to keep global warming below 2℃). A number of states, including Queensland, have also set ambitious renewable energy targets.

2050 may seem a long way off in the short time frame that dominates so much of modern politics. By 2050 Donald Trump will be 104 and presumably will exert limited influence over global politics.

However, it is worth noting that the children entering our schools next February will still be in their thirties in 2050. They will have a real interest in ensuring that we start planning for their future and taking action now.

John Thwaites is Chair of Monash Sustainable Development Institute and ClimateWorks Australia. These organisations receive funding from governments, business and from philanthropic foundations including the Myer Foundation, the Ian Potter Foundation and the Harold Mitchell Foundation. John Thwaites is a global Co-Chair of the Leadership Council of the Sustainable Development Solutions Network.

ClimateWorks is funded by philanthropy through The Myer Foundation with Monash University. ClimateWorks Australia also periodically conducts research with funding from Federal, State and local governments and from private companies; all our work is focused on supporting strong emissions reductions in Australia. The author has no other relevant affiliations

It is staggering that in 2016, the hottest year on record, the chancellor can present a budget that has no mention of climate change (Report, 24 November). Indeed, most policies and spending plans are heading in the wrong direction. We have more money for new roads and fracking keeps its subsidy, but cuts to the local authorities who subsidise bus services. 

The freeze on fuel duty is another backward step and shows that the government cares nothing about climate change, air pollution or public health. Last year saw a record number of vehicles on our roads, especially in rural areas where bus services have been decimated. The government could bring us healthier air and less congestion by raising fuel duty and using the money to reverse the devastating cuts to buses. We need to give people the choice of travelling by public transport, walking and cycling, but that can only happen if we make the polluter pay and use the money raised to invest in things that are good for our health and our environment.
Jenny Jones
Green party, House of Lords

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The claim that Greece may receive an unfair exemption to increase lignite use (Report, 3 November, theguardian.com) is not justified – it is based on misinterpretations:

1) Greece is not trying to “revive its lignite-based model”. In fact, retirements of fossil fuel plants in 2014-23 amount to 4,095MW, including 2,671MW of lignite capacity.

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Move hailed as first formal reintroduction of a once native mammal in the UK

Large populations of wild beavers living in the southern and western Highlands of Scotland are to be allowed to expand naturally after ministers granted them protected status.

For the first time since it was hunted to extinction about 300 years ago, the beaver will be officially designated as a native British species,the Scottish environment secretary announced on Thursday.

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Environmental groups hope Utah, Nevada and Grand Canyon will be included in rapid conservation efforts as Trump plans to expand fossil fuel extraction

Barack Obama’s administration is rushing through conservation safeguards for large areas of public land ahead of Donald Trump’s arrival in the White House, presenting a conundrum for the new president’s goal of opening up more places for oil and gas drilling.

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Scientists looking into invertebrate animals discover nearly 1,500 new viruses - the largest number documented in any one study.

Maria was sold into slavery - experience her story in our 360 VR feature.

All of the supermarket’s own-brand cosmetics and cleaning products will be free from the tiny plastic pieces within a month

Tesco will have phased out microbeads from all its own brand cosmetics and household cleaning products within a month, it was announced on Thursday.

While UK ministers recently said personal care products containing these tiny pieces of plastic will be banned from sale by the end of 2017, it is not clear yet whether the ban will extend to other types of products that rely on their abrasive properties.

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The Natural History Museum has chosen 25 of the year’s best images from its Wildlife Photographer of the Year 2016 shortlist. Voting is open until 10 January to find the people’s choice winning photo of the year

• Wildlife Photographer of the Year is developed and produced by the Natural History Museum, London

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Europe’s bioenergy plants are burning trees felled from protected conservation areas rather than using forest waste, new report shows

Protected forests are being indiscriminately felled across Europe to meet the EU’s renewable energy targets, according to an investigation by the conservation group Birdlife.

Up to 65% of Europe’s renewable output currently comes from bioenergy, involving fuels such as wood pellets and chips, rather than wind and solar power.

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Historic codebreaking site Bletchley Park could be turned into a cyberdefence training college.

Archaeologists in Egypt unearth what they describe as a city that dates back more than 5,000 years.