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Sunbaked southwest US is a prime spot for floatovoltaic projects, where they could produce clean energy and prevent evaporation in major man-made reservoirs, reports Environment 360

The Colorado River’s two great reservoirs, Lake Mead and Lake Powell, are in retreat. Multi-year droughts and chronic overuse have taken their toll, to be sure, but vast quantities of water are also lost to evaporation. What if the same scorching sun that causes so much of this water loss were harnessed for electric power?

Installing floating solar photovoltaic arrays, sometimes called “floatovoltaics,” on a portion of these two reservoirs in the southwestern United States could produce clean, renewable energy while shielding significant expanses of water from the hot desert sun.

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Money raised should be spent on improving public transport, cycling and walking, advise researchers

The purchase of highly polluting diesel cars in the UK should be discouraged with a tax of up to £5,000 to help tackle the public health emergency of air pollution, according to a new report.

The policy could be particularly important following the UK’s vote to leave the European Union, which until now has set most pollution rules.

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The UK government has set a world-leading climate change target up to the early 2030s.

Climate Change Committee warns of rising transport pollution, failed action on buildings emissions and says leaving the EU throws some policies into doubt

The UK has no policies in place to meet more than half of the carbon emission cuts required by law by 2030, the government’s official advisers warned on Thursday, the same day ministers committed to the target.

The advisers also warned that the UK’s Brexit vote had thrown some EU-linked climate policies into doubt.

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Reform tips for the incoming government from the Grattan Institute's program directors.

What should the priorities for the next Commonwealth Government be?

Trade group condemns failure to show UK is open for business after Brexit as government defers decision on whether to expand Heathrow or Gatwick

The government has been accused of indulging in “internal party politics” at the expense of the national interest, after David Cameron delayed a decision on whether to expand Heathrow or Gatwick airport.

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Amber Rudd allays fears that target would be casualty of EU referendum and adopts fifth carbon budget to reduce emissions 57% by 2030 on 1990 levels

The UK has announced an ambitious new carbon target for the early 2030s, allaying fears that the climate goal would be a casualty of the EU referendum.

Amber Rudd accepted the advice of the government’s statutory climate advisers, setting a target on Thursday of reducing carbon emissions 57% by 2030 on 1990 levels.

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The Rosetta probe will be crash-landed on Comet 67P on Friday 30 September, the European Space Agency has confirmed.

Britain has been a consistently progressive driver of climate policy in the European Union. Given the EU’s significance in international climate change negotiations, Britain’s vote to leave the union has implications both for EU policy and for the global Paris climate agreement struck last year.

The UK has been crucial to EU climate change policy in ways that have evolved over time. Britain’s strong domestic emissions reductions have made more ambitious EU burden-sharing targets possible. This in turn gave credibility to the idea of Europe as a global leader on climate ambition – something that has become a cherished part of many European citizens' self-identity. Britain has also been a crucial bridge between the United States and Europe in the United Nations' climate negotiation process.

Yet the EU’s climate policy ambition has arguably already declined over the past decade as it has struggled with a rising tide of resistance from more recalcitrant member states, chiefly Poland but also including, at various times, Italy, Hungary and Romania. Assuming that the EU manages to stave off any further disintegration, these voices will likely grow louder.

Poland’s recalcitrance on climate change policy has already challenged the EU’s leadership credentials, particularly since last year’s Polish elections, which installed a new conservative, Eurosceptic government.

While it has not always succeeded, British leadership has been an important balancing voice against these reluctant climate actors. Brexit has worrying consequences not just for EU climate policy but also for global progress on climate change.

Consistent vision

One of the reasons for Britain’s strong influence is its consistency across government on climate policy. This stands in contrast with other countries such as Germany and France, and even the European Commission itself, where internal divisions have sometimes meant that different ministries have pursued conflicting goals. The clarity of the UK position has been strategically important for achieving progressive EU climate policy.

Examples of British contributions to EU climate leadership abound. The UK helped broker a crucial compromise with the United States on the UN Framework Convention on Climate Change in 1992. In 2005, then prime minister Tony Blair made climate change the priority of the UK’s presidency of the EU and G8, lending clout to the EU’s claims of leadership. The UK helped shape the EU’s diplomatic efforts in Paris last year, and there were high hopes for the impact of its EU presidency in 2017 on climate policy.

In practical terms, the UK is the EU’s second-largest economy and its second-biggest emitter of greenhouse gases, after Germany in both cases. Climate change policy is an area of “shared competence” between the EU and member states, and UK climate policy is deeply embedded within broader EU frameworks such as its Emissions Trading System.

Domestic UK emissions reductions have historically been crucial to the EU’s achievement of its targets. This is due to Britain’s relatively large share of total emissions and to the UK’s pursuit of ambitious domestic targets. The UK has legislated for steeper emissions targets than required of it under EU agreements and is aiming for an 80% reduction on 1990 levels by mid-century. Along with Sweden and Denmark, it has consistently pushed for more ambitious EU-level targets.

Britain’s contribution to EU climate targets

The European Union’s official pledge to the Paris climate negotiations promised a 40% reduction in greenhouse gas emissions, relative to 1990 levels, by 2030. The UK was a key player in the internal negotiations that decided on this target. In fact, it pushed hard for a higher target of 50%.

A Brexit would also make it harder for the EU to meet its target, as the UK’s own significant emission cuts are factored into the overall target. The Paris Agreement does not allow countries to change their submitted climate pledge, except to increase it.

The EU may therefore have to work out how to distribute its 2030 reductions among its 27 remaining members without the UK’s contributions. This will be particularly challenging given the relative size of the UK contribution. Even without this complication, the EU will face the need to re-assert its capacity for leadership on climate change without one of its most ambitious members.

The future of Europe’s Emissions Trading System could also be steered by Poland after the resignation of Britain’s Ian Duncan as head of the committee overseeing the ETS review in the wake of last Friday’s referendum result.

This is not to say that Britain’s impact on EU climate change policy has always been advantageous. The UK’s close ties with the previously recalcitrant United States and its pro-market approach have frustrated the EU’s attempts to find a unified voice on climate change in the past. However, these characteristics have also enabled Britain to play a crucial bridging role between Eastern and Western Europe in internal EU negotiations. And this loss will worry those hoping that EU leadership on climate change will continue.

What does this mean for the Paris Agreement?

The EU has struggled to demonstrate the ambition required to hold the mantle of climate leader in recent years, even with the UK’s full support. The US and China’s increased engagement in global climate negotiations has meant fewer opportunities for the EU to make good on its leadership rhetoric, while the economic crisis and internal divisions have created extra hurdles.

Climate laggards within the EU can now draw out the ratification of the Paris Agreement and the renewed negotiations over how to divide the 2030 emission targets between members. Poland has long argued that the internal burden-sharing arrangements must be worked out before it will ratify the Paris Agreement.

The United Nations' outgoing lead climate negotiator, Christina Figueres, has attempted to calm fears of EU climate policy derailment by urging Britain and the EU to continue working together even after Britain leaves the union.

It is indeed likely that Britain will remain somewhat embedded in the complex architecture of EU climate policy. Iceland, a non-EU member included in much of Europe’s climate policy framework, provides a potential model for how this might work in practice.

But whatever arrangements are made, losing one of its most progressive voices on climate change will be a blow to Europe’s leadership credentials.

Natalie Latter attended the 2015 Paris climate summit with accreditation from Climate Action Network Australia.

By mapping glaciers and mountains in ultra-fine detail, Dan Holdsworth’s digital images remind us of the majesty – and fragility – of a thawing Earth

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Big utilities and conservatives tipped to push for another review of the renewable energy target if Coalition returned to power, and has support in Senate.

The electorate is concerned about global warming and strongly backs the phase-out of coal-fired power stations, so why are we hearing so little about the difference between the two major parties?

Never have so many false promises made to so many people been retracted so quickly in the face of such an unexpected victory. But Brexit has broader implications in the fight against climate change and the push for clean energy.

Egleton, Rutland The lightest night of the year couldn’t be any lighter, the tree-line stark against a fading stripe in the sky

The weather report said clear skies and a 9.30 sunset, so I drove to the lake. The western sky was wild, the sun brilliantly diffuse behind flings of cloud and fat vapour trails.

If the lake were calm the water might mirror the light and make the solstice’s half-night brighter still. In December, I was in north Scotland near the opposite pitch of this seasonal tilt: 17 hours of black night, no moon. Tonight, reversed. But this night wasn’t really about seasonal parallels. The last time there was a full moon on the summer solstice, in 1967, this lake wasn’t here.

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Here are three ways you can evaluate how the plight of the various major parties in this forthcoming election could impact on the clean energy sector.

NASA's Juno mission is almost at Jupiter. Here's why you should care.

A world-leading climate change target up to the early 2030s is set to be confirmed by the British government, cutting emissions by 57%.

Sir Paul Nurse says UK science will suffer unless any post-Brexit agreement allows the free movement of people.

Human disturbances are putting the Amazon rainforest at greater risk of fire, say researchers.