The Guardian

Foreign secretary, who backs ban on ivory trade, breaks off London speech to make plea for ‘magnificent’ vulnerable animal

Boris Johnson has interrupted a sweeping speech on the UK’s geopolitical future to make a passionate plea to save the African elephant, saying they are on the brink of extinction as they “get turned into umbrella stands and billiard balls”.

In the midst of a speech at Chatham House to ambassadors and foreign policy advisers, the UK foreign secretary said he was “obsessed with the tragic fate of the African elephant”.

A baby slow loris, a ‘walking shark’ and caribou in Alaska are among this week’s pick of images from the natural world

Paris, Madrid, Athens and Mexico City will ban the most polluting cars and vans by 2025 to tackle air pollution

Four of the world’s biggest cities are to ban diesel vehicles from their centres within the next decade, as a means of tackling air pollution, with campaigners urging other city leaders to follow suit.

The mayors of Paris, Madrid, Athens and Mexico City announced plans on Friday to take diesel cars and vans off their roads by 2025.

Climate change intensified the extreme weather in Tennessee, but its legislators deny the science

With my new hope that deniers of climate change will take ownership of the consequences, I am sad to report that this week, terrible wildfires have swept through Tennessee, a southeastern state in the USA. This state is beset by a tremendous drought, as seen by a recent US Drought Monitor map. There currently are severe, extreme, and exceptional drought conditions covering a wide swath of southern states. The causes of drought are combinations of lowered precipitation and higher temperatures.

Lawyer on president-elect’s transition team says leaving UNFCCC is ‘most practical way’ way to quit agreement, a process that normally takes four years

The US should completely quit the United Nations forum to tackle climate change in order to quickly exit the Paris climate agreement, according to a conservative lawyer who is part of Donald Trump’s transition team.

Abandoning the United Nations Framework Convention on Climate Change (UNFCCC) would allow the US to back out of the international climate effort within a year, far sooner than the four-year period that would be required to ditch the Paris accord, which came into force in November. Such a move would probably prove a severe blow to global efforts to avoid dangerous warming.

More than 50 spectacular specimens of monkeys, apes, lemurs, lorises and bushbabies will go on show at the National Museum of Scotland from 9 December. The taxidermy was specially commissioned for the exhibition and is the first to show primates behaving as if they were in the wild

It’s been a long time coming, but the world’s top powers are now betting billions on the Iter collaboration to deliver clean, safe, limitless energy for the modern world

“We are standing on the ground that could change the future of energy,” says engineer Laurent Pattison, deep in the reactor pit of the world’s biggest nuclear fusion project.

Around him is a vast construction site, all aimed at creating temperatures of 150mC on this spot and finally bringing the power of the sun down to Earth. The €18bn (£14.3bn) Iter project, now rising fast from the ground under the bright blue skies of Provence, France, is the first capable of achieving a critical breakthrough: getting more energy out of the intense fusion reactions than is put in.

Wenlock Edge, Shropshire Defying the season, the flowering hedge-bank plant has an irrepressible urge to burst forth

A hogweed blooms in the violet breath of shadows on the lane. Where garden roses are bred to keep flowering compulsively in a desperate denial of the season, the hogweed (Heracleum sphondylium) opens in defiance. In a frosty corner of the hedge bank cut down at the end of summer, one flower makes a reappearance.

Related: Late bloomers in the lee

Caribbean Princess discharged thousands of gallons of polluted bilge waste along British coast, while other ships used rigged sensors to hide contamination

Princess Cruise Lines will pay a US$40m penalty after pleading guilty to seven federal charges in an illegal ocean pollution case that involved one ship’s use of a so-called magic pipe to divert oily waste into the waters.

Miami US attorney Wifredo Ferrer told a news conference the penalty was the largest ever of its kind. A plea agreement filed in federal court also requires UK and US-listed Carnival Corp, parent company of the Princess line, to submit 78 cruise ships across its eight brands to a five-year environmental compliance programme overseen by a judge.

National Offshore Petroleum Safety and Environmental Management Authority censors documents sought by Greenpeace

Australia’s offshore oil regulator is censoring documents about BP’s plans to drill in the Great Australian Bight on the grounds that environmental campaigners could use the information to “oppose all drilling activities” there – and that the plans are too “technical” for the public to understand.

Nathaniel Pelle, a Greenpeace campaign who requested the documents under freedom of information laws, said the decision hindered democratic debate.

Doctors warn excessive intake can pose risks for some patients and say medical advice needs to be more specific

The common advice to drink plenty of water when ill is based on scant evidence and can actively harm chances of recovery, doctors have warned.

Medics at King’s College hospital NHS foundation trust, in London, raised the alarm after they treated a patient with hyponatremia – abnormally low sodium – from drinking too much water to help with a recurring urinary tract infection.

Overwhelming majority of people agree the government should legislate to stop chemicals polluting the Great Barrier Reef

More than two-thirds of Australians think the condition of the Great Barrier Reef should be declared a “national emergency” and support much stronger measures to protect it than are now being considered.

On Thursday the government released its report on the reef to Unesco, which was a condition of the reef being excluded from the UN body’s “world heritage in-danger” list. The government reported slow progress on the key issue of water quality and the failure of a major plank in the plan – slowing tree clearing in Queensland.

Tree campaign groups across Sheffield have been at pains to garner expert inputs to substantiate their very clear arguments against the Sheffield chainsaw massacre (Letters, 29 November). The Woodland Trust is a longstanding critic of the Sheffield “Streets Ahead” programme and its epic and disastrous plans for street tree “management”. Equally, the Sheffield Wildlife Trust has not been shy about its deep reservations. More recently, the Arboricultural Association has felt compelled to take a position. It is insulting to condemn them as “fanatics”.

Campaigners do not advocate saving every tree and have a clear position on the removal of the dead and the dangerous. Yet we live in a post-truth, post-factual world. Perhaps then we should be unsurprised when finding some rot and a little deadwood are being cast in the way of constructive dialogue.

From an Arctic expedition to working in a studio in the school of biology and environmental science at University College Dublin, artist Siobhan McDonald collaborates with researchers to broach subjects at the edges of current scientific knowledge

• Crystalline, curated by Helen Carey, will open at the Centre Culturel Irlandais, Paris, on 26 January 2017
  

Energy and climate targets are ‘well within reach’ but the transport sector is lagging behind

EU countries are on track to meet their 2020 targets for renewable energy and emissions cuts but could fall short of ambitious longer-term goals, the European Environment Agency (EEA) said on Thursday.

“The EU’s 2020 targets on energy and climate are now well within reach,” EEA executive director Hans Bruyninckx said.

Environmentally friendly groups at Companies vs Climate Change said they will work to make sure Trump won’t undo all the progress the country has made

From his claim that global warming was a gigantic hoax masterminded by China to his promise to pull the United States out of the landmark Paris agreement, Donald Trump’s surprise election win was widely decried by those who feared that recent progress in tackling climate change was about to come undone.

Related: Donald Trump presidency a 'disaster for the planet', warn climate scientists

The last Tasmanian tiger, or thylacine, is said to have died in 1936 and was declared extinct in 1986. The Thylacine Awareness Group claims there have been 5,000 reported sightings of thylacines in the past 80 years, however, they do acknowledge video evidence is ambiguous

• Footage courtesy of Thylacine Awareness Group YouTube channel
• Tasmanian tiger sightings: ‘I represent 3,000 people who have been told they’re nuts’
  

Efforts to curb tree clearing have failed, the government admits in its update to Unesco on work to save the world heritage site

Australia needs to work faster on lifting water quality to save the Great Barrier Reef, according to its first progress report to Unesco since the world heritage site was spared an “in-danger” listing.

The report admitted that a key plank of Australia’s conservation plan – land-clearing reforms in Queensland to staunch water pollution – had failed. It also highlighted climate change, which is the biggest threat to the reef and led to the worst recorded coral bleaching in its history this year, but which the plan makes no attempt to address.

Waitrose, John Lewis and Argos among the first users of a new biomethane fuel for gas-powered trucks, reports BusinessGreen

Gas-powered lorries laden with Christmas parcels are set to have a lighter carbon impact this season thanks to the launch today of a new renewable fuel from CNG Fuels.

Retailers including John Lewis, Argos and Waitrose have already confirmed some of their long-distance lorries will run on the green gas – a renewable biomethane fuel derived from food waste – which is up to 40% cheaper than diesel and emits 70% less carbon dioxide, CNG Fuel says.

Through the Export-Import Bank, the Obama administration has spent nearly $34bn on dirty energy plants in countries from India to Australia to South Africa

Seemingly little connects a community in India plagued by toxic water, a looming air pollution crisis in South Africa and a new fracking boom that is pockmarking Australia. And yet there is a common thread: American taxpayer money.

Through the US Export-Import Bank, Barack Obama’s administration has spent nearly $34bn supporting 70 fossil fuel projects around the world, work by Columbia Journalism School’s Energy and Environment Reporting Project and the Guardian has revealed.