The Guardian

Push for nuclear and gas over renewables could be more costly in the long term, warns UN’s environment chief

The UK government risks slowing the shift to clean energy sources by cutting support for renewable energy and strongly backing gas as a transitional fuel, according to the UN’s environment chief.

Achim Steiner, executive director of the UN Environment Programme (UNEP), told the Guardian that he thought the UK’s push for nuclear and gas over renewables could be more costly in the long term.

From phasing out coal to creating nature reserves, it is the EU which should be taking lectures from the UK, not the other way round

The leading lights of the UK environmental movement would have us believe that a win by the Brexit camp on 23 June would be akin to a natural disaster.

According to them, it is only our membership of the EU that renders our beaches swimmable, our water drinkable and our air almost breathable. Freed from the noble, ceaseless efforts of the ever-vigilant EU, troglodyte Britain would tear up decades of environmental legislation and return to our 1970s roots as the “dirty man” of Europe. This is complete and utter tosh.

Speaking on Q&A, Christopher Pyne rejects a suggestion that the Coalition’s Direct Action climate policy could operate as a de facto emissions trading scheme, while responding to a question from the audience, Pyne claims the scheme was not intended to work that way. The industry minister and his regular sparring partner, opposition frontbencher Anthony Albanese, were the only two panellists on Monday’s election special, which fell in week three of the eight-week campaign

Arctic would warm by as much as 20C by 2300 with disastrous impacts if action is not taken on climate change, warns new study

The planet would warm by searing 10C if all fossil fuels are burned, according to a new study, leaving some regions uninhabitable and wreaking profound damage on human health, food supplies and the global economy.

The Arctic, already warming fast today, would heat up even more – 20C by 2300 – the new research into the extreme scenario found.

Drone footage shows around 70 tiger sharks eating a whale in the aptly named Shark Bay, around 500 miles north of Perth, Western Australia. The video was posted to the Eco Abrolhos Facebook page, which operates cruises to nearby islands.

Temperatures in a city in the desert state of Rajasthan have hit 51C (123.8F) – the highest on record in India. A drought has left many villages and towns without regular water. Schools have closed, some hospitals have stopped performing surgery, and in some regions daytime cooking has been banned due to the fire risk

The first of its kind, a new international treaty obliges signatories to intercept pirate fishers before they can sell their catch

In March, the Argentinian coast guard shot at and sank a Chinese vessel that was alleged to be fishing illegally in Argentinian waters (the crew were all rescued). While it’s unclear whether the boat was committing crime, the incident showed that the tension surrounding pirate fishing is reaching a peak, marked elsewhere by increasing conflict, and the detainment and scuttling of illegal fishing fleets. But for pirate fishers, the financial gains appear to be worth these risks.

Illegal fishing vessels siphon off up to 26 million tons of illegally caught fish each year, which amounts to over $23bn (£16bn) in profit. This not only deprives legitimate fishers of their catch, but as it’s an unregulated practice, it also undermines the stability of fisheries stocks around the world. Illegal fishing also has a hand in driving already threatened species closer to extinction—like the critically-endangered vaquita, the world’s smallest porpoise, whose fate is rapidly being worsened by illegal fishers in Mexico who tangle and drown the small, protected mammals in their gill nets.

UN’s top environmental scientist warns bottles and bags do not break down easily and sink, as report highlights the ubiquity of plastic debris in oceans

Biodegradable plastic water bottles and shopping bags are a false solution to the ubiquitous problem of litter in the oceans, the UN’s top environmental scientist has warned.

Most plastic is extremely durable, leading to large plastic debris and “microplastics” to spread via currents to oceans from the Arctic to the Antarctic, a UN report published on Monday found.

Rock climber Alex Honnold argues we must do more to defend US national parks from a slew of imminent environmental threats

Just over eight years ago, I completed a free solo ascent – unroped – of the one of the most beautiful and challenging climbs in the world: a 350 metre crack called Moonlight Buttress in southwestern Utah’s Zion national park. At the time, Alpinist magazine called it “one of the most impressive free solos ever achieved.”

While I find it hard to articulate exactly why I’m drawn to this type of exposed, unroped climbing, the setting certainly plays a big role. Zion is aptly named: it’s a promised land of striking multicolored sandstone cliffs soaring from a green valley below. Though I’m intensely focused when I climb, the gift of doing it in such breathtaking places is not lost on me.

From 3-15 May, thousands of young people around the world took part in civil disobedience on six continents, calling for oil, coal and gas to be kept in the ground. Anna Pérez Català from Climate Tracker shares some of her favourite pictures from the Break Free protests.

As Harmony of the Seas sets sail from Southampton docks on Sunday she will leave behind a trail of pollution – a toxic problem that is growing as the cruise industry and its ships get ever bigger

When the gargantuan Harmony of the Seas slips out of Southampton docks on Sunday afternoon on its first commercial voyage, the 16-deck-high floating city will switch off its auxiliary engines, fire up its three giant diesels and head to the open sea.

But while the 6,780 passengers and 2,100 crew on the largest cruise ship in the world wave goodbye to England, many people left behind in Southampton say they will be glad to see it go. They complain that air pollution from such nautical behemoths is getting worse every year as cruising becomes the fastest growing sector of the mass tourism industry and as ships get bigger and bigger.

A fleeing giraffe, a sleeping racoon and a close encounter with a great white shark are among this week’s pick of images from the natural world

They’ve been called ‘the beast of destruction’ and ‘the abortion issue of wildlife’, but efforts to save the wolf’s population – and perception – are worth celebrating

Some species are eliminated through sheer human carelessness, as we clumsily attempt to mould the world in our image. America’s gray wolf, on the other hand, was almost gleefully wiped out, exterminated with a visceral mixture of disgust and fear.

Related: Wolf population reaches new high at Yellowstone park

Leading Monsanto, Dow and Syngenta products could be withdrawn from shops by July after committee fails to agree on whether glyphosate poses a health risk to humans

Bestselling weedkillers by Monsanto, Dow and Syngenta could be removed from shops across Europe by July, after an EU committee failed for a second time to agree on a new license for its core ingredient, glyphosate.

The issue has divided EU nations, academics and the World Health Organisation (WHO) itself. One WHO agency found it to be “probably carcinogenic to humans” while another ruled that glyphosate was unlikely to pose any health risk to humans, in an assessment shaded by conflict of interests allegations earlier this week.

Aung San Suu Kyi’s new government must safeguard the ocean from illegal fishing that has depleted stocks by 70-90% and is killing endangered sea turtles and dugongs

As Aung San Suu Kyi’s National League for Democracy (NLD) engaged in a historic transfer of power in the Myanmar capital of Naypyidaw in March, my Burmese colleagues and I stood on a deserted beach 170 miles to the southwest, near Gwa on the Rakhine coast. We were speaking to local fishermen about their livelihoods and hearing about the unfortunate death of a young dugong – southeast Asia’s cousin of the manatee.

To the naked eye, the blue sea and miles of white sand with no development or people in sight were a vision of paradise. And yet, as we learned, below the surface things were far from idyllic. The young dugong that accidentally drowned in a fishing net was just one symptom of another tragedy and challenge unfolding in this country – one that, while nearly unnoticed, could have major implications for the future of millions of rural people.

Levels of CO2 are pushing beyond 400 parts per million in the atmosphere. The last time they were there, 15 million years ago, the world was very different

Round numbers can trigger all sorts of weird and sometimes irrational responses.

For example, in about 19 years time when I turn 40 there’ll be some sort of celebration at which I’m told I have reached a milestone. The number can also trigger denial in those afflicted (I honestly wouldn’t know*).

About 3,000 British schools are in areas where air quality is poor, with those in poorer communities suffering more

Former London mayor Boris Johnson has been accused of holding back negative findings from a 2013 report on the city’s air pollution.

The report stated that 433 of London’s 1,777 primary schools were in areas where nitrogen dioxide concentrations breached EU limits. Nitrogen dioxide, or NO2, is an air pollutant that when inhaled can aggravate respiratory diseases such as asthma, emphysema and bronchitis. It has been estimated that in 2010 there were 5,900 deaths in London associated with long term exposure to NO2.

Grizzly bears in Alaska and Canada are moving north as their environment warms, bringing them into contact with polar bears located on the coastline

Climate change is known for swelling the oceans and fueling extreme weather, but it may be also causing the curious emergence of a new type of bear in the Arctic.

A bear shot in the frigid expanse of northern Canada is believed to be a grizzly-polar bear hybrid, a consequence of the increasing interactions between the two imposing bear species.

Country’s low emissions action plan cannot be undone even by a Donald Trump presidency, but it may put global cooperation on climate change at risk

The US would still meet its obligations under the Paris accord on climate change if Donald Trump were elected president, a senior US administration official has told the Guardian.

He said the path of the US towards a lower-carbon economy was already set, and was dependent on market forces that would not easily succumb to political tinkering.

Women now hold six of the most influential positions at global climate talks, but can they make a difference on the ground? Climate Home reports

Whisper it quietly, but a gender revolution is taking place at the global climate change negotiations.

As of 17 May, the six most influential positions within the UN process are all held by women, a significant increase on last year’s total of two.