More and more emerging diseases threaten trees around the world

Diseases are among the major causes of tree mortality in both forests and urban areas. New diseases are continually being introduced, and pathogens are continually jumping to new hosts, threatening more and more tree species. ...

Southwestern US on alert for dangerous heatwave

A large swathe of the southwestern United States was on alert Thursday for a potentially deadly heatwave that could push temperatures as high as 47 degrees celsius (117 Fahrenheit) over the coming days.

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