What Is Global Warming?

Global Warming is an increase average temperature of the earth surface in the air and oceans.

Global warming is neutral as to the period or causes, but this term generally refers to warming and implies a human influences. An increase in global temperatures can cause a lot of changes, including sea level rise. The globally averaged temperatures since the mid-20th is very likely to increase in greenhouse gas, which leads to warming of the surface and lower atmosphereby increasing the greenhouse effect.

Climate models referenced predict that global surface temperatures are likely to increse by 1.1 to 6.4 between 1990 and 2100.