The Guardian

Guardian environment reporter Oliver Milman joins a group of scientists on an underwater expedition off the Bermuda coast to help chart its hidden depths and gauge the general health of the area’s reef and coral. Travelling in a two-man submersible, Milman and submarine pilot Kelvin Magee go on a journey 500ft below the surface

The deep ocean makes up 95% of Earth, yet only 0.0001% has been explored – the Guardian joined a mission off Bermuda looking deeper than ever before

Video: a dive into Bermuda’s hidden depths

The largest migration on Earth is very rarely seen by human eyes, yet it happens every day. Billions of marine creatures ascend from as far as 2km below the surface of the water to the upper reaches of the ocean at night, only to then float back down once the sun rises.

This huge movement of organisms – ranging from tiny cockatoo squids to microscopic crustaceans, shifting for food or favourable temperatures – was little known to science until relatively recently.

New fossil fuel advocacy group launched to celebrate an industry that’s driving dangerous climate change

Bright and glistening with all the glory of youth and promise, her eyes glance upwards. A jet crosses a cloudless sky.

A field of wheat sways in the breeze. She opens her arms in a wide embrace, open to the horizon.

Flora and Fauna International has been hired by a British mining firm to assess the environmental value of a national park in the Arctic circle

Environmentalists and indigenous reindeer herders are calling on the Queen, Sir David Attenborough and Stephen Fry to disassociate themselves from a charity contracted to help a mining operation in a national park in Finland.

Fauna and Flora International (FFI), whose patron is the Queen, has been hired by the British-listed mining company Anglo American to assess the environmental value of Viiankiaapa, a stunning 65 sq km (25 sq mile) habitat for 21 endangered bird species in the Arctic circle.

Queensland’s relaxed land-clearing laws have allowed 84,000ha of habitat to be destroyed and must be rolled back, say WWF and Australian Koala Foundation

A relaxation in Queensland’s tree clearing laws led to the destruction of 84,000 hectares of critical koala habitat in the two years after the national icon was listed as vulnerable, according to new mapping by conservationists.

That koala habitat made up about 14% of all land cleared between mid-2013 and mid-2015 was an alarming revelation, WWF and the Australian Koala Foundation said.

Research by the National Trust for Scotland shows rare mountain plants in the Highlands and islands are retreating higher or disappearing entirely

There is clear evidence that some of Britain’s rarest mountain plants are disappearing due to a steadily warming climate, botanists working in the Scottish Highlands have found.

The tiny but fragile Arctic plants, such as Iceland purslaine, snow pearlwort and Highland saxifrage, are found only in a handful of locations in the Highlands and islands, clustered in north-facing gullies, coires and crevices, frequently protected by the last pockets of late-lying winter snow.

Ecologists and botanists have been working with highly skilled mountaineers in a series of intensive studies to map and track mountain plants and help ecologists understand the impact and speed of climate change

Drakewalls, Tamar Valley The spoil tips and the dressing floors where ore was processed have been covered in earth, and seeded with grass and flowers

Up the hill from Gunnislake, Drakewalls mine was the first stop for the Man Engine on the huge mechanical puppet’s celebratory journey through the world heritage mining landscapes of Cornwall this summer. Now the site is quiet again, bereft of the admiring crowds. Consolidated ruins of engine houses and chimneys remain from the 19th century, when this mine was the largest tin producer in east Cornwall, employing 398 people at its peak. Wolframite, a tungsten mineral, was separated from the tin ore and, by 1890, arsenic and copper were also being produced and loaded in sidings that connected to the new mineral railway. Contemporary reports described underground caverns that could be “traversed only by boat”. Earlier opencast excavations were filled in, but there remains a walled-in linear chasm or “gunnis”, choked with ferns and bushes. Come 1895, production was almost finished: “Coals stopped, mine stopped, water risen in the shaft.”

A Conservation International team has counted an average of 252 species of reef fish at each site in the waters around Atauro Island – more any other place on the planet. There is a push to protect the island, which is 24km north of Timor-Leste’s capital, Dili, with a view to developing an ecotourism industry.

The National Parks Service celebrates its 100th birthday in August. How have America’s natural wonders impacted your life? Share your stories and photos

For 100 years, the National Parks Service has been providing Americans and international visitors alike with unspoiled vistas – and vacations to match.

Ahead of the centennial on 25 August, we want to hear from you. Do you have a particularly memorable hiking adventure to tell us about? Or an undeniably beautiful shot of a waterfall or mountain range? Share your stories and photographs with us. We’ll feature a selection in our coverage.

Natural range of critically endangered western swamp tortoise increasingly untenable owing to reduced rainfall

Twenty-four of Australia’s rarest tortoises have been released outside their natural range because climate change has dried out their remaining habitat.

The natural range of the critically endangered western swamp tortoise, Pseudemydura umbrina, has shrunk to two isolated wetlands in Perth’s ever-growing outer suburbs, and a herpetological expert, Dr Gerald Kuchling, said reduced rainfall and a lowered groundwater table made those areas increasingly untenable.

Coastal village of Shishmaref, which is losing ground to rising sea levels, could become the first in the US to move over the threat of climate change

The residents of an Alaskan coastal village have begun voting on whether to relocate because of rising sea levels.

If they vote to move, the village of Shishmaref, just north of the Bering Strait, and its population of 650 people, could be the first in the US to do so because of climate change.

July was hotter than any month globally since records began – but some areas, such as the Middle East, suffer more than others

In Siberia, melting permafrost released anthrax that had been frozen in a reindeer carcass for decades, starting a deadly outbreak. In Baghdad, soaring temperatures forced the government to shut down for days at a time. In Kuwait, thermometers hit a record 54C (129F).

July was the hottest month the world has endured since records began in 1880, scientists have said, and brought a painful taste of the troubles people around the world may have to grapple with as global warming intensifies. Results compiled by Nasa showed the month was 0.84C hotter than the 1951-1980 average for July, and 0.11C hotter than the previous record set in July 2015.

Second phase of new benchmark will cut equivalent of greenhouse gases emitted by electricity and power from all US residences in one year, officials say

US trucks will produce 10% less carbon dioxide and consume 10% less fuel within a decade under the last major plank of Barack Obama’s climate policy.

The second phase of a new benchmark for medium- and large-sized trucks will cut more than 1bn metric tonnes of carbon dioxide emissions and 2bn barrels of oil use, the Environment Protection Agency announced on Tuesday.

Simon Jenkins writes that “To question China’s good intentions in financing the power station [at Hinkley Point] is silly. It is a French-built plant, and the idea that Beijing might contrive to embed and then activate some doomsday bug is absurd” (Trade with China is a good thing. But Hinkley Point is a dud, 11 August).

Not that absurd. The China General Nuclear Group (CGN), which is involved in financing Hinkley Point, expects to build a new nuclear station with its own reactor at Bradwell in return for its involvement at Hinkley. This was agreed by David Cameron and Xi Jinping last October.

Researchers have captured rare footage of the stubby squid – a purple-colored species with large eyes – during an exploration voyage off Santa Monica, California. The somewhat rare species, which looks like a cross between an octopus and squid, spends its life on the seafloor, burrowing into the sand for camouflage and using its large eyes to spot incoming prey, such as shrimp and small fish

Southern Louisiana has been ravaged by a slow-moving rainstorm that the National Weather Service has called a ‘1,000-year’ disaster. Thousands of people have evacuated their homes and at least eight people are dead as of Tuesday morning. The historic storm began in the corner of Florida’s gulf coast in the first week of August

• Louisiana begins recovery from devastating storm – in pictures
  

Species that feed most on the bright yellow flowers of the crop treated with controversial neonicotinoids have fallen by as much as 30%

Pesticides used on oilseed rape crops, whose bright yellow flowers have become an increasingly common sight across the British countryside, are harming native populations of wild bees, scientists have conclusively proved.

Species that feed most on the flowers of the now-profitable cash crop used for vegetable oils and animal fodder are down by as much as 30%, according to the wide-ranging study published in the journal Nature.

Multibillion-pound Hornsea Project Two, 55 miles off Grimsby coast, would see 300 turbines span an area five times size of Hull

The second phase of the world’s biggest offshore windfarm is set to be built off the Yorkshire coast after being approved by ministers.

The multibillion-pound Hornsea Project Two would see 300 turbines – each taller than the Gherkin – span an area five times the size of Hull.

National Oceanic and Atmospheric Administration to classify disaster as the eighth flood considered to be a once in every 500-year event in the US in a year

The historic and devastating floods in Louisiana are the latest in a series of heavy deluges that some climate scientists warn will become even more common as the world continues to warm.

On Tuesday, the National Oceanic and Atmospheric Administration (Noaa) is set to classify the Louisiana disaster as the eighth flood considered to be a once in every 500-year event to have taken place in the US in little over 12 months.