Research flights probe particulate impact on climate

In a winter of unpredicted weather, a multiyear project to investigate the possible effects of air pollution on California's precipitation launches a new phase with a series of research flights that begin today featuring ...

Europe braces for blistering June weekend heat

France, Spain and other western European nations braced on Saturday for a sweltering June weekend that is set to break records and sparked concern about forest fires and the effects of climate change.

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