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Here is a good basic article on natural and human causes of climate change from The Conversation. This article focuses on the role of carbon dioxide in the atmosphere, although of course there are other causes too, such as land use changes, changes in albedo from sea and land ice, and solar radiation changes. You can read it here.
Arctic cotton grass grows on Greenland’s seashore. Sedge is almost four weeks ahead of its timetable 10 years ago. Photograph: Pearl Bucknall/Alamy
