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Some long-haul flights connecting Europe and Asia are emitting 40% more CO₂ since the Russian invasion of Ukraine in February 2022, my new study shows. The spike is largely due to airspace closures above conflict zones which are forcing airlines to seek alternative routes, significantly increasing flight times. Longer flights…

January 2025 was the hottest on record – a whole 1.7°C above pre-industrial levels. If many climate-watchers expected the world to cool slightly this year thanks to the natural “La Niña” phenomena, the climate itself didn’t seem to get the memo. In fact, January 2025’s record heat highlights how human-driven…

Uncommon Courses is an occasional series from The Conversation U.S. highlighting unconventional approaches to teaching.

All animals live in or seek a set of climate conditions they find tolerable. This “climate envelope” partially determines where animals are found, but the continued existence of many species now rests on the outcome of human-driven climate change.

What if well-meaning policies that reduce one atmospheric pollutant could also increase natural emissions of powerful greenhouse gases?

Do you feel powerless?

Imagine one morning, you are deciding whether to drive to work or catch the train. Eventually, you decide to drive. On your way to the office, a squirrel crosses the road leaving you no time to react, and you run them over. Did you do anything wrong by deciding to…

Citizen science is a powerful tool for involving more people in research. By influencing policy, it is transforming conservation at global, national and local levels.

The economic cost of food waste in Australia is staggering. It’s estimated $36.6 billion is lost to the economy every year. Much of our fresh produce never even makes it to stores, rejected at the farm gate due to cosmetic reasons, such as its appearance, size or ripeness.

Toxic substances used in flea and tick treatments pet owners give to their dogs and cats have been detected in birds’ nests, according to new UK research.

Nature-based solutions use nature to solve environmental problems caused by humans, such as global climate change. But not every ecological project counts as a nature-based solution. Some projects only bring about a slight improvement to the environment, while others even cover up environmental damage. Cornelius Okello and Timothy A. Downing…