An anonymous reader quotes a report from The Guardian: Greenland’s ice is starting to melt faster than at any time in the past 12,000 years, research has shown, which will raise sea levels and could have a marked impact on ocean currents. New measurements show the rate of melting matches any in the geological record for the Holocene period — defined as the period since the last ice age — and is likely to accelerate, according to a paper published in the journal Nature. The increased loss of ice is likely to lead to sea level rises of between 2cm and 10cm by the end of the century from Greenland alone, according to the study.

These changes, over the relatively short period of less than a century, appear to be unprecedented. Greenland’s ice sheet shrank between 10,000 and 7,000 years ago, and has been slowly cumulating over the past 4,000 years. The current melting will reverse that pattern and within the next 1,000 years, if global heating continues, the vast ice sheet is likely to vanish altogether. If greenhouse gas emissions continue to rise strongly, the rate of melting could accelerate further to be four times greater than anything found in the past 12,000 years.

The team behind the latest Greenland study made their estimates by producing a computer model of a section of the south-western region of the ice sheet over the past 12,000 years and then projecting forward to the end of this century. They checked their findings against what we can tell actually occurred with the ice, through satellite measurements and other instruments, and also by mapping the position of boulders containing beryllium-10. These are deposited by glaciers as they move, and measurements of beryllium-10 can reveal how long the boulders have been in position, and therefore where the edge of the ice sheet was when the boulder was deposited.

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Source: Slashdot – Greenland’s Ice Melting Faster Than At Any Time In Past 12,000 Years

Ikea will remove all non-rechargeable alkaline batteries from its global home furnishings by October 2021, according to statement from the company emailed Wednesday. CNET reports: Aiming to reduce energy consumption and environmental waste with the move, the home furnishing giant cited the results of recent life-cycle assessment studies showing the environmental impact of alkaline batteries is higher compared with rechargeable nickel metal hydride batteries, when used in common household devices. The Swedish company, based in the Netherlands, said between September 2018 and August 2019 it sold about 300 million alkaline batteries globally. Ikea calculates that if all of its customers switched from alkaline to rechargeable batteries and recharged them just 50 times, global waste could be reduced by as much as 5,000 tons on an annual basis. Ikea added, however, that where required for an individual product to function, some lithium ion button cell batteries will be kept in the product range. “We are on a journey to inspire and enable people to live healthier and more sustainable lives within the boundaries of the planet,” said Ikea Sustainability Development Manager Caroline Reid. “By phasing out alkaline batteries and focusing on our range of rechargeable batteries, we are taking one step on that journey, offering customers an affordable and convenient solution to prolong the life of products and materials and reduce waste.”

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Source: Slashdot – IKEA Is Saying Goodbye To Non-Rechargeable Batteries

Even as Amazon spends tens of millions on new robotics and technologies to automate its warehouses, workers are still paying the price with more than 14,000 serious injuries — requiring days off or job restrictions — reported in fulfillment centers in 2019, according to a report from Reveal. TechCrunch reports: Overall, the company saw 7.7 serious injuries per 100 employees, a number that’s 33% higher than it was four years ago and double the most recent industry standard, despite significant investments and claims that safety is improving at its facilities, the report said. A document dump from the Center for Investigative Reporting given to Reveal, internal safety reports and weekly injury numbers from Amazon’s network of national fulfillment centers shows that Amazon has misled the public about its safety record. And that the company’s biggest shopping days — during Prime week and the long holiday season — are the most dangerous for its workers.

In a statement, Amazon called Reveal’s report “misinformed” and quibbled over the terminology, while claiming that “we continue to see improvements in injury prevention and reduction” through a variety of programs, though documents in the report suggest otherwise. Bulletins sent out every month reveal a grim tally of injuries and safety problems, problems that the company was well aware of. Updates marked “Privileged & Confidential” and reportedly obtained by Reveal indicate that the company has failed to hit safety targets. Despite its intentions to reduce injury rates by 20% in 2018, rates rose. In 2019, when the company decided to try and lower its injury rates by a more modest 5%, the number of injuries still went up.

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Source: Slashdot – Serious Injuries At Amazon Fulfillment Centers Topped 14,000, Despite the Company’s Safety Claims

Facebook is now allowing select users use Instagram to chat with friends on Facebook Messenger and vise-versa. Instagram’s direct messages system is also being expanded with features taken from Messenger. The Verge reports: New Instagram messaging tools include vanishing messages, selfie stickers, custom emoji, chat colors, new ways to block unwanted messages, and the introduction of Messenger’s Watch Together feature, which lets you watch videos with friends during a video call. Users will be able to reject the update if they choose, but Facebook will no doubt be betting that access to new features will encourage them to say yes. In addition to cross-platform messaging, users on Instagram and Messenger can also search for profiles across both apps simultaneously. Users can opt out of these features if they wish. According to CNN, the [cross-platform messaging feature] is currently being “tested in select markets and will expand globally in the coming months.”

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Source: Slashdot – Facebook Launches Cross-Platform Messaging On Instagram and Messenger

An anonymous reader quotes a report from Ars Technica: Mercedes-Benz just announced that its new eCitaro and eCitaro G city buses will be available with roof-mounted solid-state battery packs, developed in conjunction with the Canadian power company Hydro Quebec. Although details are still rather limited right now, Mercedes-Benz says that the solid-state pack has a 25-percent higher energy density than even the most advanced lithium-ion chemistry. It also says that the solid-state battery has a much better service life than lithium-ion and is warrantying these batteries for 10 years or an energy throughput of 280MWh. When configured with a total of 441kWh onboard (composed of seven 63kWh packs), an eCitaro G has a range of up to 137 miles (220km) under favorable conditions, or 105 miles (170km) in the depth of winter with the bus’s heaters running.

However, these solid-state batteries aren’t perfect. In particular, they aren’t able to fast-charge at rates comparable to lithium-ion, which is why Mercedes-Benz is also offering the bus with an optional lithium-ion pack that can be charged at 150kW or even 300kW instead. This uses a nickel-manganese-cobalt chemistry and comes in assemblies of 33kWh that can be combined to give a bus up to 396kWh in total. “In a traditional battery, a pair of electrodes are immersed in an electrolyte solution, and it’s this liquid electrolyte that allows ions to move from one electrode to the other,” the report adds. “But liquid electrolytes can leak, and that’s not a great thing, whether the material is highly corrosive, as in a lead-acid battery, or highly flammable, as in a lithium-ion battery. So researchers around the world have been experimenting with batteries that use a solid electrolyte instead, with a particular eye on using them in electric vehicles.”

Further reading: The Slashdot Interview With Lithium-Ion Battery Inventor John B. Goodenough

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Source: Slashdot – Mercedes-Benz’s Newest Electric City Bus Uses Solid-State Batteries