What is Global warming????

Answer 1

Global warming refers to the increase in the average temperature of the Earth's near-surface air and oceans in recent decades and its projected continuation.

The global average air temperature near the Earth's surface rose 0.74 ± 0.18 °C (1.33 ± 0.32 °F) during the last 100 years. The Intergovernmental Panel on Climate Change (IPCC) concludes, "most of the observed increase in globally averaged temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations" via the greenhouse effect. Natural phenomena such as solar variation combined with volcanoes probably had a small warming effect from pre-industrial times to 1950 and a small cooling effect from 1950 onward. These basic conclusions have been endorsed by at least 30 scientific societies and academies of science, including all of the national academies of science of the major industrialized countries. A few individual scientists disagree with some of the main conclusions of the IPCC.

Climate model projections summarized by the IPCC indicate that average global surface temperature will likely rise a further 1.1 to 6.4 °C (2.0 to 11.5 °F) during the 21st century. The range of values results from the use of differing scenarios of future greenhouse gas emissions as well as models with differing climate sensitivity. Although most studies focus on the period up to 2100, warming and sea level rise are expected to continue for more than a millennium even if greenhouse gas levels are stabilized. The delay in reaching equilibrium is a result of the large heat capacity of the oceans.

Increasing global temperatures will cause sea level to rise, and is expected to increase the intensity of extreme weather events and to change the amount and pattern of precipitation. Other effects of global warming include changes in agricultural yields, glacier retreat, species extinctions and increases in the ranges of disease vectors.

Remaining scientific uncertainties include the amount of warming expected in the future, and how warming and related changes will vary from region to region around the globe. There is ongoing political and public debate worldwide regarding what, if any, action should be taken to reduce or reverse future warming or to adapt to its expected consequences. Most national governments have signed and ratified the Kyoto Protocol, aimed at reducing greenhouse gas emissions.

Answer 2

Its the idea that carbon dioxide is building up in the atmosphere and that is a gas that does not allow heat to escape into space once it comes in from the sun, so the planet gets hotter and hotter. It isn't always warming, however. If the Greenland ice cap melts enough the heat engine that makes the Gulf Stream operate will stop and then Europe will freeze like Siberia because it will have no warm water off shore with prevailing wind carrying warmth from England to Poland and beyond. It does seem to be true that the world is warming up and that CO2 is building up at faster than usual rates. The question seems to be NOW, whether the human race is contributing. People are afraid that it might cost a lot of money to stop adding CO2, and that China and India and the rest of the developing world wouldn't help out, anyway. The oceans are expected to rise. Florida will be under water. So will downtown New York. So will the Netherlands. It will be a big problem. Too bad. Glad I won't be around to see it when its really bad.

Answer 3

Global - means "of the entire planet".
Warming - the temperature is rising.

Google or wikipedia is your friend. Its too big a topic to type it all in here.

Answer 4

A hoax put forth by people without the right info. Wait until they start talking about a global cooling in 10 years. I'll have my snowboard ready...