We speak to Chris Field, a leading member of the Nobel Prize-winning Intergovernmental Panel on Climate Change, about his warning that the amount of greenhouse gases in the atmosphere is rising more rapidly than expected in recent years. Field says the current trajectory of climate change is now much worse than the IPCC had originally projected. On Wednesday, Field told a Senate panel droughts caused by global warming could make parts of the American Southwest dangerous to live in. [includes rush transcript]moreless
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