科学与环境
Africans reuse, repair, recycle and resell waste: What's needed to build on the circular economy basics
来源: Phys.org - latest science and technology news stories · 发布于
In many African cities, a broken fridge is rarely thrown away immediately. It may be repaired and resold, dismantled for spare parts or collected for its metal components.
In many African cities, a broken fridge is rarely thrown away immediately. It may be repaired and resold, dismantled for spare parts or collected for its metal components.
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Controversial US-backed vaccine trial in African newborns halted
Hepatitis B study in Guinea-Bissau that was to be funded by CDC and that drew global backlash ‘will not move forward’ The US-backed hepatitis B vaccine trial in African newborns that drew global backlash was halted, the lead researcher said on Wednesday. It was “now clear” that t
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RFK Jr’s ‘deities of vaccine research’ raided by police in Guinea-Bissau
Police seize doses of hepatitis B vaccine from people at center of dispute over research on African newborns Controversial vaccine researchers who have been praised by Robert F Kennedy Jr, the US Department of Health and Human Services (HHS) secretary, had their offices in Guinea
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Private business fortunes reveal overlooked source of wealth and inequality in America
A majority of Americans blame billionaires for the nation's ever-growing income and wealth divide. But economists Eric Zwick and Owen Zidar say there's a much larger but little-known cadre of very rich folks who may be even more important in closing the gap.
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Virus that sickens cows, kills deer still rare in New York state—for now
An insect-driven disease that causes high mortality in white-tailed deer and mimics the symptoms of foot-and-mouth disease in cattle is still rare in New York state, but the warming climate may increase its future spread.
Phys.org - latest science and technology news stories ·
Four questions about schoolwork feedback to guide young students' learning
What happens when a young student gets a low math score? A parent may say, "Math has never been your strength." A teacher might write "careless" beside a calculation.
Phys.org - latest science and technology news stories ·