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Malaria is marching north, and global warming will make it worse, with mosquito armies colonising Europe, the US and highland regions of the South. That’s the picture being painted by a panel of UN scientists and several national governments. But for one of the world’s senior entomologists, this is not honest science. Paul Reiter is chief entomologist at the US government’s dengue research lab in Puerto Rico. And he’s afraid that attributing the spread of malaria to global warming could detract attention from much-needed efforts to combat the disease itself and save lives now. Ehsan Masood asked him why…