Crews prepare to sink Mauritius spill ship despite opposition

MV Wakashio has split in two and leaked 1,000 tonnes of oil into the water since it ran aground

Salvage crews were preparing to sink a Japanese-owned ship that ran aground off Mauritius, despite opposition from environmental campaigners.

The MV Wakashio broke into two on Saturday, almost three weeks after hitting a reef and spilling 1,000 tonnes of oil into idyllic waters full of marine life.

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Greenland ice sheet lost a record 1m tonnes of ice per minute in 2019

Climate-driven loss is likely to be the worst for centuries, and is pushing up sea levels

The Greenland ice sheet lost a record amount of ice in 2019, equivalent to a million tonnes per minute across the year, satellite data shows.

The climate crisis is heating the Arctic at double the rate in lower latitudes, and the ice cap is the biggest single contributor to sea level rise, which already imperils coasts around the world. The ice sheet shrank by 532bn tonnes last year as its surface melted and glaciers fell into the ocean and would have filled seven Olympic-sized swimming pools per second.

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‘Cancer of the industry’: Beirut’s blast proves lethal risk of abandoning ships

Cargo from the MV Rhosus caused the explosion in Lebanon’s main port – its crew say they were stranded aboard for a year

The problems began the moment Captain Boris Prokoshev set sail aboard the MV Rhosus in 2013.

He discovered that the ageing Russian-owned cargo ship, bound for Mozambique, was in “terrible” condition, including having a defunct generator. Then he learned that the previous crew had mutinied over unpaid wages. So it was no surprise when the owner told Prokoshev there was no money to pay for fees for the Suez canal, either.

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Witness K is in the dock but institutions vital to Australia’s democracy are on trial | Ian Cunliffe

Some people seem to be above the law. Those people do not include the whistleblower and his lawyer, Bernard Collaery

Timor-Leste only achieved independence in 2002. It was Asia’s poorest country and desperately needed revenue. Revenue from massive gas resources in the Timor Sea was its big hope. But it needed to negotiate a treaty with Australia on their carve-up. Australia ruthlessly exploited that fact: delays from the Australian side in negotiating a treaty for the carve-up of those resources, and repeated threats of more delays, were a constant theme of the negotiations. In November 2002 the former Australian foreign minister Alexander Downer told Timor-Leste’s prime minister, Mari Alkatiri: “We don’t have to exploit the resources. They can stay there for 20, 40, 50 years.” In late 2003 Timor-Leste requested monthly discussions. Australia claimed it could only afford two rounds a year. Poor Timor-Leste offered to fund rich Australia’s expenses. Australia didn’t accept.

Related: Witness K and the 'outrageous' spy scandal that failed to shame Australia

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Supertrawlers ramp up activity in UK protected waters during lockdown

Fishing time in first half of 2020 almost double that in whole of last year, Greenpeace says

Supertrawlers vastly stepped up their fishing in the UK’s protected waters during the coronavirus lockdown earlier this year, while most of the UK’s smaller vessels were confined to port.

The amount of time supertrawlers spent fishing in marine protected areas in the first half of this year was nearly double that spent in the waters in the whole of last year, according to a Greenpeace investigation. There were 23 supertrawlers catching fish in UK protected areas in the period, none of them UK-owned.

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Mauritius calls for urgent help to prevent oil spill disaster

Stranded oil tanker is breaking up, threatening even greater ecological devastation

People living in Mauritius have described the devastation caused by an oil spill from a stranded tanker and called for urgent international help to stop the ecological and economic damage overwhelming the island nation.

More than 1,000 tonnes of fuel has already seeped from the bulk carrier MV Wakashio into the sea off south-east Mauritius, polluting the coral reefs, white-sand beaches and pristine lagoons that attract tourists from around the world.

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Small crustacean can fragment microplastics in four days, study finds

‘Completely unexpected’ finding is significant as harmful effects of plastic might increase as particle size decreases

Small crustaceans can fragment microplastics into pieces smaller than a cell within 96 hours, a study has shown.

Until now, plastic fragmentation has been largely attributed to slow physical processes such as sunlight and wave action, which can take years and even decades.

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Robot dolphins: the cruelty-free £20m ‘animal’ you can’t tell from the real thing

Creators say robot dolphins provide an alternative to keeping cetaceans in captivity and could be rolled out in Chinese aquariums

They can respond to questions, swim happily in shopping mall display tanks, and withstand close contact that would usually be harmful to real animals – without any ethical problems. And they could soon be coming to aquariums in China.

Entrepreneurs in New Zealand are working with American creators of some of Hollywood’s most famous creatures to develop animatronic dolphins that look almost identical to their living counterparts.

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Why we need sharks: the true nature of the ocean’s ‘monstrous villains’

Why did dolphins get Flipper while sharks got Jaws? These majestic, diverse animals bring balance to the ocean ecosystem – and they’re in grave danger

Each day, as the sun sets over the coral-fringed Raja Ampat Islands in Indonesia, an underwater predator stirs. As predators go, it’s not especially big or ferocious – an arm’s length from head to tail, with a snuffling, moustachioed snout.

What’s unique is that it doesn’t so much swim along the seabed as walk. Using its four fins as legs, and twisting its spine like a lizard, it can emerge from the water and hold its breath for an hour, strutting across the exposed reef and clambering between tide pools to find prey.

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How do you deal with 9m tonnes of suffocating seaweed?

Across the Gulf of Mexico and the Caribbean, scientists are developing alternative sustainable solutions to the golden tide of Sargassum

The Great Atlantic Sargassum Belt, first detected by Nasa observation satellites in 2011 and now known to be the world’s largest bloom of seaweed, stretches for 5,500 miles (8,850km) from the Gulf of Mexico to the western coast of Africa.

Millions of tonnes of floating Sargassum seaweed in coastal waters smother fragile seagrass habitats, suffocate coral reefs and harm fisheries. And once washed ashore on Mexican and Caribbean beaches, this foul-smelling, rotting seaweed goes on to devastate the tourist industry, prevent turtles from nesting and damage coastal ecosystems, while releasing hydrogen sulphide and other toxic gases as it decomposes.

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Plastic superhighway: the awful truth of our hidden ocean waste

Solving the issue of waste in our seas turned out to be more complex than scrounging for bottles off the beach, Laura Trethewey found

We called the competition Who Found the Weirdest Thing? So far, the entries that day were a motorcycle helmet, a lithium battery covered with scary stickers asking that we return it to the military, and a toy dinosaur.

The dinosaur was warm from the sun and starting to degrade. The ocean had smoothed and worn down its edges. Rocks and sand had crosshatched its skin. It was missing a hind leg. On one side it was dark grey; the sun had bleached its opposite flank white.

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‘I raised hell’: how people worldwide answered the call of World Oceans Day

From protecting fishing communities to regrowing coral reefs, Guardian readers and environmentalists share how they’re working to defend the ocean

World Oceans Day, which took place on Monday, is marked by hundreds of beach cleans and events globally. Despite Covid-19 restrictions, environmentalists and readers from around the world shared how they are continuing to work to protect the ocean, and told us about the local marine issues that matter to them.

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Supertrawlers ‘making a mockery’ of UK’s protected seas

Vast vessels spent almost 3,000 hours fishing in officially protected areas in 2019

Supertrawlers spent almost 3,000 hours fishing in UK marine protected areas in 2019, making “a mockery of the word ‘protected’,” according to campaigners.

Supertrawlers are those over 100 metres in length and can catch hundreds of tonnes of fish every day, using nets up to a mile long. A Greenpeace investigation revealed that the 25 supertrawlers included the four biggest in the world and fished in 39 different marine protected areas (MPAs).

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Bid for first eco-labelled bluefin tuna raises fears for protection of ‘king of fish’

Conservationists warn the species, which was almost extinct 10 years ago, could be under threat if Japanese fishery is MSC certified

A decade ago, the highly prized “king of fish”, the bluefin tuna, was taken off menus in high-end restaurants and shunned by top chefs, amid warnings by environmentalists that it was being driven to extinction. Recent assessments of Atlantic bluefin tuna, which can grow to the size of a small car and live for up to 40 years, have shown much healthier populations.

But now conservationists and scientists are warning that the largest and most valuable tuna species could once again be under threat if a Japanese bluefin fishery in the Atlantic Ocean is awarded an internationally recognised “ecolabel” they claim is based on flawed science.

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Crab blood to remain big pharma’s standard as industry group rejects substitute

Animal rights groups have been pushing a synthetic alternative to horseshoe crab blood in drug safety testing

Horseshoe crabs’ icy-blue blood will remain the drug industry’s standard for safety tests after a powerful US group ditched a plan to give equal status to a synthetic substitute pushed by Swiss biotech Lonza and animal welfare groups.

The crabs’ copper-rich blood clots in the presence of bacterial endotoxins and has long been used in tests to detect contamination in shots and infusions.

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We are eating shrimp in record number. But for how much longer?

Shrimpers have a long and proud cultural tradition in the US – one that is now under threat from all sides

Captain Wynn Gale – a fifth-generation Georgia shrimper – is on the side of the road on an April morning, selling shrimp at the same street corner where his dad sold shrimp.

“How’s the pandemic treating you?” I ask.

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Climate change in deep oceans could be seven times faster by middle of century, report says

Uneven heating could have major impact on marine wildlife, as species that rely on each other for survival are forced to move

Rates of climate change in the world’s ocean depths could be seven times higher than current levels by the second half of this century even if emissions of greenhouse gases were cut dramatically, according to new research.

Different global heating at different depths could have major impacts on ocean wildlife, causing disconnects as species that rely on each other for survival are forced to move.

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Microplastic pollution in oceans vastly underestimated – study

Particles may outnumber zooplankton, which underpin marine life and regulate climate

The abundance of microplastic pollution in the oceans is likely to have been vastly underestimated, according to research that suggests there are at least double the number of particles as previously thought.

Scientists trawled waters off the coasts of the UK and US and found many more particles using nets with a fine mesh size than when using coarser ones usually used to filter microplastics. The addition of these smaller particles to global estimates of surface microplastics increases the range from between 5tn and 50tn particles to 12tn-125tn particles, the scientists say.

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Cargo ship sailors press-ganged into keeping the world’s trade afloat

‘Ticking time bomb’ as contracts aren’t honoured and ports stop crews going ashore even for urgent medical care

Thomas Stapley-Bunten was due to finish his contract aboard the Al Shamal, a huge cargo ship carrying liquid natural gas, early last month. The ship docked at the LNG terminal in Fos Cavaou, southern France, as planned, but by then the world was in coronavirus lockdown. He couldn’t disembark, and international flights were grounded, preventing him from getting home to Newcastle, UK.

So the 27-year-old former Royal Navy warfare officer has been stuck onboard as the Al Shamal criss-crosses the ocean from Qatar to Turkey and France and back. The 34-man crew, from the Philippines, India, Russia and Ireland, have had their pay increased by 50%, but they just want to go home.

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Sea levels could rise more than a metre by 2100, experts say

Oceans rising faster than previously thought, according to survey of 100 specialists

Sea-level rise is faster than previously believed and could exceed 1 metre by the end of the century unless global emissions are reduced, according to a survey of more than 100 specialists.

Based on new knowledge of climate sensitivity and polar ice melt, the experts say coastal cities should prepare for an impact that will hit sooner than predicted by the United Nations and could reach as high as 5 metres by 2300.

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