CNBC: Ebola outbreaks may become more frequent because of climate change, scientists have warned, as the deadly disease ravages four countries across West Africa.
Nearly 2,000 people have caught Ebola since the epidemic started in February. More than 1,000 people have died.
All four countries hit--Liberia, Sierra Leone, Guinea-Bissau and Nigeria--have declared public health emergencies, and the World Health Organization (WHO) has termed the outbreak "unprecedented".
Scientists are uncertain why...