Worst 'megadroughts' in 1,000 years threaten Western US, scientists warn

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Study finds drought events 'driven primarily' by human-induced global warming will wreak havoc over latter half of 21st century

Parts of the US will likely face "megadroughts" worse than anything experienced in the past 1,000 years as a result of climate change, researchers have warned. The dry conditions, which are expected...

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