Kräftor odlas idag för både utplantering och för konsumtion. Odling av sötvattenskräftor sker oftast i grunda grävda dammar där kräftorna både lever av den föda som förekommer naturligt i dammen samt av foder. För att minska risken för predation från exempelvis häger är det dock viktigt att strandkanterna inte är för grunda. Kräftodling sker i många fall också utan extra matning och skötsel (så kallad extensiv odling) i jorddammar på jordbruks- och skogsbruksfastigheter.

There’s good reason for optimism. In 2003 the National Renewable Energy Laboratory published results from a lab study of American Kestrels suggesting that painting a single blade black could protect birds by cutting down on motion smear. The report recommended that scientists test the idea in the field. A team in Norway answered that call and published a paper in 2020 showing a 72 percent reduction in avian fatalities at a small wind farm on the island of Smøla. “That really lit things on fire,” says Robb Diehl, leader of the Wyoming project’s science team and an ecologist with the U.S. Geological Survey.

We develop products, that

• stop microplastic pollution
• are easy to integrate into your daily routines
• raise awareness about the consequences of microplastics in the environment

Environmentalists from the organization Environment.People.Law developed a study devoted to the methods of restoring the environment after hostilities. What do the experts suggest to do? We analyze each of the solutions.

”Vi arbetar med partners som fångar in koldioxiden innan den släpps ut i atmosfären. Vi använder det sedan i vår process för att framställa alkohol”, säger Gregory Constantine, vd och medgrundare för Air Company, till CNBC.

Some scientists fear we are nearing a point of no return in the Amazon rainforest, which exerts power over the carbon cycle like no other terrestrial ecosystem on Earth. Evidence is mounting that in certain areas, localized iterations of irreversible damage may already be happening.

In Boston they just did a poll where they asked "even though it means less space on the streets for cars, do you want to keep the parklets we've put in during COVID?" Eighty-one percent said keep the parklets. They asked about keeping the bike lanes and 79 percent said keep the bike lanes. This is a randomized poll, they're not stopping cyclists on the street. That's where public opinion is, but that's not necessarily what the leaders are hearing whenever the question comes up about keeping or eliminating an individual parklet or bike lane.

The standard story about nuclear costs is that radiation is dangerous, and therefore safety is expensive. The book argues that this is wrong: nuclear can be made safe and cheap. It should be 3 c/kWh — cheaper than coal.

Stringfoot is a term used to describe pigeons whose feet have become entangled with foreign matter, whether actual string, thread, monofilament, real or artificial human hair (most common), dental floss, yarn, or the many other materials discarded by the human population of cities.

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Whether adult birds or chicks, these foreign materials wrapped around their feet or legs — and sometimes binding their feet together — results in pain, infection, loss of digits or entire feet, and the subsequent inability to walk, stand, perch, land, feed or bathe properly, sometimes leading to illness or death...

We show that for thousands of years, humans have concentrated in a surprisingly narrow subset of Earth’s available climates, characterized by mean annual temperatures around ∼13 °C. This distribution likely reflects a human temperature niche related to fundamental constraints. We demonstrate that depending on scenarios of population growth and warming, over the coming 50 y, 1 to 3 billion people are projected to be left outside the climate conditions that have served humanity well over the past 6,000 y. Absent climate mitigation or migration, a substantial part of humanity will be exposed to mean annual temperatures warmer than nearly anywhere today.