Spread of disease
Climate change accelerates the spread of disease primarily because warmer global temperatures enlarge the geographic range in which disease-carrying animals, insects and micro organisms can survive. As northern countries warm, disease carrying insects migrate north, bringing plague and disease with them. Researchers have found that in less developed world more waterborne disease outbreaks (such as cholera) follow major precipitation events, which are already increasing due to global warming.

Changing rainfall patterns
Global warming could shift rainfall patterns. New research shows that about 4.5 cm more rain fell annually in Canada, Russia, and Europe in recent years than it did in 1925. In the northern tropics and subtropics, such as Mexico and northern Africa, rainfall has decreased by nearly 7 cm per year. And the southern tropics and subtropics such as Peru and Madagascar have seen increased rainfall of about 6 cm. The temperature rise of oceans has also increased the probability and frequent of stronger hurricanes

Intense heat waves
Although some areas of Earth will become wetter due to global warming, other areas will suffer serious droughts and heat waves. Africa will receive the worst of it, with more severe droughts also expected in Europe. Water is already a dangerously rare commodity in Africa, and according to the Intergovernmental Panel on Climate Change, global warming will exacerbate the conditions and could lead to conflicts and war.

Economic consequences
The potential negative effects of global warming are very serious. In fact global warming has the potential to cause unprecedented costs to the global economy. According few estimates 20% of global output could be lost over the next few decades. Most of the effects of anthropogenic global warming won’t be good, as well. Hurricanes cause do billions of dollars in damage, diseases cost money to treat and control and conflicts exacerbate all of these.

Polar ice caps melting
There are 5,773,000 cubic miles of water in ice caps, glaciers, and permanent snow. According to the National Snow and Ice Data Centre, if all glaciers melted today the seas would rise about 230 feet. Melting ice caps will throw the global ecosystem out of balance. The desalinisation of the gulf current will ‘upset’ ocean currents, which regulate temperatures. The stream shutdown or irregularity would cool the area around north-east America and Western Europe.