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Global warming will expose millions more people to malaria as parasite-bearing mosquitoes move to higher altitudes, according to new research into the health perils from climate change. Tropical highland areas in Africa, Asia and central and southern America are particularly at risk, a study in the US journal Science said on 6 March 2014. Malaria, which killed an estimated 620,000 people in 2012, is among a host of diseases that researchers warn will spread more easily due to global warming. For Ethiopia alone, a one-degree-Celsius increase in temperature will lift the area where malaria can occur by 150 metres.