what are the reasons for global warming?

Answer 1

the ozone layer of the earth is too strong so the heat stays in the earth

Answer 2

The main reason that most people are concern about that cause global warming is green house gases. These emissions, whether they be CO2 or methane etc. supposedly create a blanket over the atmosphere which allows heat in but not out. Many people believe that man has greatly increased global warming by driving cars and burning fossil fuels in power plants etc.

Answer 3

First & foremost reason is ' Green House Effect '.

Excessive creation of Green house gasses ( Carbon Di Oxide , Mithane , Nitrous Oxide etc ) in industries or vehicles has made a gas - layer under the atmosphere that's why sun rays with small wavelength can come in through it and makes the earth surface warm.... The earth surface then radiates the infrared radiation which is higer in wave length , it can't go out through the green house gas-layer.... So the heat remains nearer the earth surface & thus Global Warming is being created.

Answer 4

Some gases ("greenhouse gases") let sunlight in, which warms the Earth, and then block that heat from leaving. That's the "greenhouse effect", and it's a natural thing, mostly caused by water vapor.

Man is making excessive amounts of greenhouse gases, mostly by burning fossil fuels. That causes the delicate natural balance to go out of whack and the Earth warms. That's global warming.

It won't be a Hollywood style disaster. Gradually coastal areas will flood and agriculture will be damaged. But it will be very bad. Rich countries will cope, but it will take huge amounts of money. In poor countries many people will die of starvation, but not all of them.

Most scientists say, in 20-50 years. But we need to start right now to fix it, fixing it will take even longer than that.

More information here:

http://profend.com/global-warming/

Lots of numerical scientific data proving it real here:

http://en.wikipedia.org/wiki/Image:Climate_Change_Attribution.png

http://www.ipcc.ch/SPM2feb07.pdf

Answer 5

The first and foremost reason for global warming is a human.He has just become money minded and for his small profits he has been simply destroyed the gifted nature.This has ultimately given rise to a major problem-GLOBAL WARMING!!! The increased use of automobiles,ACs,refrigerators emit gases that contribute in global warming.So just be aware og global warming and try your best at least to reduce it to some extent........

Answer 6

When the dinosaurs were here for over 200 million years there was no snow. For 5 billion years before that there was no snow. Global warming is just making a come back. Enjoy the heat.

Answer 7

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

Global average air temperature near the Earth's surface rose 0.74 ± 0.18 °C (1.3 ± 0.32 °F) during the past century. 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,"[1] which leads to warming of the surface and lower atmosphere by increasing the greenhouse effect. Natural phenomena such as solar variation combined with volcanoes have probably had a small warming effect from pre-industrial times to 1950, but a small cooling effect since 1950.[2][3] 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. The American Association of Petroleum Geologists is the only scientific society that rejects these conclusions.[4][5] A few individual scientists disagree with some of these conclusions as well.[6]

Climate models referenced by the IPCC project that global surface temperatures are likely to increase by 1.1 to 6.4 °C (2.0 to 11.5 °F) between 1990 and 2100.[1] The range of values reflects the use of differing scenarios of future greenhouse gas emissions and results of models with differences in 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. [1] This reflects the large heat capacity of the oceans.

An increase in global temperatures can in turn cause other changes, including sea level rise, and changes in the amount and pattern of precipitation resulting in floods and drought[7]. There may also be changes in the frequency and intensity of extreme weather events, though it is difficult to connect specific events to global warming. Other effects may include changes in agricultural yields, glacier retreat, reduced summer streamflows, species extinctions and increases in the ranges of disease vectors.

Remaining scientific uncertainties include the exact degree of climate change expected in the future, and how changes will vary from region to region around the globe. There is ongoing political and public debate 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 combating greenhouse gas emissions

Answer 8

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

Global average air temperature near the Earth's surface rose 0.74 ± 0.18 °C (1.3 ± 0.32 °F) during the past century. 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,"[1] which leads to warming of the surface and lower atmosphere by increasing the greenhouse effect. Natural phenomena such as solar variation combined with volcanoes have probably had a small warming effect from pre-industrial times to 1950, but a small cooling effect since 1950.[2][3] 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. The American Association of Petroleum Geologists is the only scientific society that rejects these conclusions.[4][5] A few individual scientists disagree with some of these conclusions as well.[6]

Climate models referenced by the IPCC project that global surface temperatures are likely to increase by 1.1 to 6.4 °C (2.0 to 11.5 °F) between 1990 and 2100.[1] The range of values reflects the use of differing scenarios of future greenhouse gas emissions and results of models with differences in 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. [1] This reflects the large heat capacity of the oceans.

An increase in global temperatures can in turn cause other changes, including sea level rise, and changes in the amount and pattern of precipitation resulting in floods and drought[7]. There may also be changes in the frequency and intensity of extreme weather events, though it is difficult to connect specific events to global warming. Other effects may include changes in agricultural yields, glacier retreat, reduced summer streamflows, species extinctions and increases in the ranges of disease vectors.

Remaining scientific uncertainties include the exact degree of climate change expected in the future, and how changes will vary from region to region around the globe. There is ongoing political and public debate 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 combating greenhouse gas emissions.

Answer 9

CO2, methane and other greenhouse gases are responsible for global warming. But CO2 is mostly responsible.CO2 emitting from every substance is increasing global warming.

Answer 10

Climate change, more commonly known as global warming, is caused by the emission of heat trapping gases produced by vehicles, power plants, industrial processes and deforestation. As these gases build up, they act like a big blanket, over-heating the planet and threatening our health, our economy and our environment.

Answer 11

global warming is a big cause in present scenario.
actually d reasons r that 4 gases mainly the cfc,nox,ch4,so2 r polluting the environment & increasing the gaseous humidity depleting d earths atmosphere....causing d probs.
secondly cutting of trees,depleting natural covers,cracking of ozone layer on earth crust,pollution by man etc r major issues governin in causing global warming.