We have been pumping out greenhouse gases for a very long time – and now we have evidence that humans were changing the climate over a century ago
1 May 2019
By Adam Vaughan
DROUGHTS around the world dating to the early 20th century may have been made worse by greenhouse gas emissions.
Scientists have previously hesitated to draw links between global warming and drought, due to a lack of observational data and the difficulty of distinguishing natural cycles of dry conditions from ones that are driven by climate change.
But Kate Marvel at the University of Columbia in New York and her colleagues have found that the impact of greenhouse gas emissions on drought …