what is global warming??

Answer 1

Global warming is the observed increase in the average temperature of the Earth's near surface air and oceans in recent decades and its projected continuation. Models referenced by the Intergovernmental Panel on Climate Change (IPCC) predict that global temperatures are likely to increase by 1.1 to 6.4 °C (2.0 to 11.5 °F) between 1990 and 2100.[1] The uncertainty in this range results from two factors: differing future greenhouse gas emission scenarios, and uncertainties regarding climate sensitivity.

Global average near-surface atmospheric temperature rose 0.74 ± 0.18 °Celsius (1.3 ± 0.32 °Fahrenheit) in the last century. The prevailing scientific opinion on climate change is that "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,"[1] which leads to warming of the surface and lower atmosphere by increasing the greenhouse effect. Greenhouse gases are released by activities such as the burning of fossil fuels, land clearing, and agriculture. Other phenomena such as solar variation and volcanoes have had smaller but non-negligible effects on global mean temperature since 1950.[2] A few scientists disagree about the primary causes of the observed warming.

An increase in global temperatures can in turn cause other changes, including a rising sea level and changes in the amount and pattern of precipitation. These changes may increase the frequency and intensity of extreme weather events, such as floods, droughts, heat waves, hurricanes, and tornadoes. Other consequences include higher or lower agricultural yields, glacier retreat, reduced summer streamflows, species extinctions and increases in the ranges of disease vectors. Warming is expected to affect the number and magnitude of these events; however, it is difficult to connect particular events to global warming. Although most studies focus on the period up to 2100, even if no further greenhouse gases were released after this date warming (and sea level) would be expected to continue to rise for more than a millennium, since carbon dioxide (CO2) has a long average atmospheric lifetime.

Remaining scientific uncertainties include the exact degree of climate change expected in the future, and especially how changes will vary from region to region across the globe. A hotly contested political and public debate also has yet to be resolved, regarding whether anything should be done, and what could be cost-effectively done to reduce or reverse future warming, or to deal with the expected consequences. Most national governments have signed and ratified the Kyoto Protocol aimed at combating global warming.

Answer 2

Global warming as a term means the general warming of the Earth. Our current fixation on Global Warming (or climate change...which is just a change in climate) is really more of a political engine more than an actual scientific event. We cooled in the 70s and it caused people to think we were going to have an ice age. We're cyclically warming now, so people think the Earth is going to overheat and all life will be destroyed.

Basically, don't worry about it since there's no proven evidence that people have any measureable impact on climate change (anyone who says anything contrary has a political agenda and you should be skeptical). If the Earth is warming, then it will warm and we'll adjust. If it's cooling, then it will cool and we'll adjust. That's how it's always been and how it will be.

Remember, all your local weathermen can get the weather wrong for tomorrow. Why do you trust scientists to make accurate predictions about 10 years or 100 years from now?

Answer 3

Global warming is the observed increase in the average temperature of the Earth's near surface air and oceans in recent decades and its projected continuation and it results from two factors: differing future greenhouse gas emission scenarios, and uncertainties regarding climate sensitivity.
An increase in global temperatures can in turn cause other changes, including a rising sea level and changes in the amount and pattern of precipitation.

Answer 4

Global warming happens when earth gets warm because of the gas that the industries provide, Global warming causes the ice in the poles melt and the increase of water causes the sea side countries go under the water.Thats all!

Answer 5

Gases like carbon-dioxide, methane can absorb a lot of heat. If a lot of these gases are present in the atmosphere, the temperature of the Earth's atmosphere will rise. As a result the permanent ice sheets on the Earth's surface will melt and the sea level will go up. There is a huge possibility that if this continues, a number of islands, coastal cities will go under the ocean floor.

Answer 6

Global warming is the observed increase in the average temperature of the Earth's near surface air and oceans in recent decades and its projected continuation. Models referenced by the Intergovernmental Panel on Climate Change (IPCC) predict that global temperatures are likely to increase by 1.1 to 6.4 °C (2.0 to 11.5 °F) between 1990 and 2100.[1] The uncertainty in this range results from two factors: differing future greenhouse gas emission scenarios, and uncertainties regarding climate sensitivity.

Answer 7

It's crap put out by the left. The earth naturally goes through warming/cooling cycles. We just happen to be in a warming cycle. It's arrogant of man to think that anything he does affects the temperature of the world.

Answer 8

Global warming seems to be evidence that man is predisposed to religion. It is more about faith than science and that is proved if you ever hear the righteousness with which the global warming alarmists preach if you dare doubt their god.

Answer 9

in case you desire to obtain grant money for climate analyze, do you think of which you will get a cheque in case you're saying," i desire the availability, as i think of that i will coach that the figures that the present paradigm relies upon are incorrect" ? the super environmentalist, David Bellamy, has been silenced, and refused airtime. there remains no shown causative link between the quantity of Co2 interior the ambience, and an boost in international temperatures. The WWWF pictures of the polar bears swimming have been taken interior the Arctic summer time; while the ice cap partly melts, as they could no longer arise to image interior the wintry climate. The ice grew to become into too thick! The East-Anglian uni analyze figures. "Oh! The figures do no longer tournament our expectancies. Oh properly. shop quiet. because of the fact all of us understand that we are stunning." while the perception, and the religion is extra significant than squarely dealing with the valid doubts of quite some non grant-supported scientists, technology has been superceded by making use of religious zealots. As Oliver Cromwell colourfully pronounced." I pray thee, interior the bowels of Christ, evaluate that thou mayest be incorrect."

Answer 10

global warming is the warming up of earth's atmosphere by carbon dioxide released by factories.....