A strange orange morning dawned in New York City on Tuesday last week, the usually pale yellow sunlight filtered through a haze of smoke from wildfires burning more than 1,000km north in Nova Scotia, Canada.
The causes of the fires that were spewing the smoke – which now regularly shrouds large swathes of North America, Australia and South-east Asia – may vary, but the underlying reality is that the warming planet has made them more frequent, widespread and intense.
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