Fierce winter weather slams US, dozens dead

Unrelenting storms have pummeled the United States over the past week, leading to at least 50 weather-related deaths, officials and US media reported Friday, as large swathes of the country brace for new winter wallops.

Ecological 'doom loops' edging closer, study warns

Extreme weather events such as wildfires and droughts will accelerate change in stressed systems leading to quicker tipping points of ecological decline, according to a new study.

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