What is global warming?
374055
in simple words is an increasing of the average temperature of the Earth. This is mostly due by the increasing of the concentration of greenhouse gases in the atmosphere.\n\nMore at the next link:\nhttp://www.ncdc.noaa.gov/oa/climate/globalwarming.html\n\nA map:\nhttp://www.climatehotmap.org/index.html
1050462
Well, the weather changes very quickly, however global warming has been happening for a while. It is in the past while predicting the weather is in the future. There is data that shows a warming trend on Earth. So, you can trust it, at least as fact that is IS happening. Most people agree on that. However nobody is sure whether or not this heating is natural or caused by humans.
63093
Global warming is an effect in the earth's lower atmosphere that is claimed to exist by many scientists today.  Essentially, the theory claims that carbon monoxide, fluorocarbons and other gases have damaged the ozone layer, the protective layer in the earth's upper atmosphere that protects the planet from the Sun's ultraviolet (UV) radiation.  Some man-made causes of these gases are automobile emissions and bovine flattulance.  The supposed increased levels of UV radition are striking the earth in greater incidence, especially in the equatorial oceans. Hence, according to the theory, the warming oceans are changing weather patterns and melting the polar ice caps.   More severe storms and raising of the ocean levels are possible.  Detractors of the theory contend, however, that evidence for diminishment of the ozone layer, warming of the oceans and melting of the polar ice caps is scant due to the lack of longitudinal (long-term) climatological data for the earth.  In sum, it is unclear whether the changing weather patterns that appear to be happening are caused by man-made activities or part of some cycle governed by normal processes.
514782
Anthropogenic impact means human impact. Even without human interference, the earth goes through natural warming and cooling cycles. Most recently there was an ice age (with glaciers that melted to form the great lakes), and that's why the earth is warming now. "Global warming," though significantly sped up by humans, is a natural process that's been happening since life first began on this planet.
59118
Global warming is an increase in the average temperature of the Earth's atmosphere and oceans. The term is also used for the scientific theory of anthropogenic global warming, which attributes much of the recently observed and projected global warming to a human-induced intensification of the greenhouse effect. On this theory, the increased volumes of carbon dioxide and other greenhouse gases released mainly by the burning of fossil fuels, and, to a lesser extent, land clearing and agriculture, are the primary sources of warming. The natural greenhouse effect keeps the Earth 30 °C warmer than it otherwise would be; adding carbon dioxide to an atmosphere, with no other changes, will make a planet's surface warmer. Current research is attempting to find out more details about the processes and factors that would affect a temperature increase especially about positive and negative feedback mechanisms, to allow a more precise quantification of the effects of global warming.\n\nTemperature change is just one aspect of the broader subject of (human-induced) climate change. The scientific opinion on climate change, as expressed by the UN Intergovernmental Panel on Climate Change (IPCC) and explicitly endorsed by the national science academies of the G8 nations, is that the average global temperature has risen 0.6 ± 0.2 °C since the late 19th century, and that it is likely that "most of the warming observed over the last 50 years is attributable to human activities" [1]. A small minority of qualified scientists contest the view that humanity's actions have played a significant role in increasing recent temperatures. Uncertainties do exist regarding how much climate change should be expected in the future, and a hotly contested political and public debate exists over what actions, if any, should be taken in light of global warming.\n\nBased on basic science, observational sensitivity studies, and the climate models referenced by the IPCC, temperatures may increase by 1.4 to 5.8 °C between 1990 and 2100 [2]. This is expected to result in other climate changes including rises in sea level and changes in the amount and pattern of precipitation. Such changes may increase the frequency of extreme weather events such as floods, droughts, heat waves, and hurricanes, change agricultural yields, or contribute to biological extinctions. Although warming is expected to affect the number and magnitude of these events, it is very difficult to connect any particular event to global warming.
301188
If you mean global warming, it's the scientific observation that the earth's temperature is rising over a period of time This is resulting in polar melting, raising the ocean level and affecting other weather patterns.
260304
global warming is cause by greenhouse gases being trapped near earths atmosphere, which causes heat to be trapped nearer to earths surface which increases the temperature on earth slightly which melts the polar ice caps which makes water levels rise which means islands will be flooded and shores will advance into the land making living space smaller in an already overpopulated world.
359692
The radiations emitted from the sun and also the earth are usually blocked by layers of atmospheric gases and prevent them from escaping into space.This causes 'GLOBAL WARMING'-due to the reflected radiations.This is also known as 'GREEN HOUSE EFFECT'.
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Pollution caused by exhaust gases plus CO2 blocks the radiation of heat from the earth into the universe. Thus global warming will cause the sea level to rise as much as 2 kilometers high in the near future.
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It is Global Warming.  Geologically speaking we are still coming out of the last ice age.  We are on in a natural cycle which has been accerated by pollution.
815930
Global warming is the latest trend by Governments of the world to try to convince the population that we are at fault for warming the world.  The world's weather and climate has been changing regularly over the last 15,000 years - before cars and planes were invented.  Carbon dioxide is one of the most prolific gasses in our atmosphere because it is needed for plants to survive.  Without CO2, the plants would die and we would have no oxygen which is a by product of a plant and we would all die!  Remember all the other scare stories over the years - in the 60s it was nuclear bombs from Russia, then we had SARS and bird flu, then terrorists and don't forget the hole in the ozone layer.  Every couple of years, we get a major scare story to keep the world's population under control.  The effect of global warming is that we are all paying out so called green taxes that actually do nothing to stop the problem but it sure makes the Governments rich!  What is the point of worrying about future global warming when now you have people freezing to death in the winter because they cannot afford to heat their homes because the price of gas and electric has risen so much because of green taxes?  Or we are getting plagues of rats and other vermin because Councils only collect our rubbish every two weeks because recycling is top priority?  We really should solve todays problems first before we start worrying about something that will most likely never happen.
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Isn't global warming enough?! Because of this ice bergs are melting which mean animals will die. Air is becoming thinner which means we can die.  Global warming IS something to worry about!\n\nwww.stopglobalwarming.org
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Yes, Global warming is a reality.  Anyone who says otherwise is ignorant.   Yes, the earth goes throgh natural warming and cooling phases, we are currently trasistioning into a "hothouse" from an "icehouse" which means we are in an inter-glacial period.\n\nHowever, Humans are doing their part to screw up the atmosphere.  CO2 is a gas that traps heat  and is emmitted by cars, factories, and anything else that burns fuel to work.  All anyone needs to do is look at a graph of the average surface temperture for the earth superimposed on the CO2 level and they will find they are identical in shape.  And the CO2 level has increased exponentially since the industrial evolution.  While the earth's natural cycles have varied the CO2 levels from 150 to 280 parts per million in the last 600,000 years, we are currently at 390 parts per million and rising fast.  No that is not natural, it is caused by humans.\n\nWhat can you do?  Buy a Prius.  Recycle.  Use less - ride you bike more.  Run your AC less, Turn off your lights.  All those hippie things that save energy - they actually work.
100431
global warming  im not kidding
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http://en.wikipedia.org/wiki/Global_warming
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Global warming is due to the huge quantity of some kind of gaz that human activity ejects in the atmospher. That gaz in itself does not warm, but it has indirect effects: destroying the earth's protection towards these sunshines and keeping the heat of these sunshines into the earth's atmospher.\nWhy people don't care much about it? It's because they don't realize that the earth as they know it could drastically change. Until now, it took billions of years to change, so human lifetime (and even the complete human History!!!) isn't much compared to the usual scale of big climate changes. But the earth human population, its activity and its ability to pollute have increased so much that it has become possible for humanity to go straight into a wall without even realizing it!!!
1154290
climate change is a natural effect. Global Warming is caused by man.