what do you is major cause of global warming?
359037
Natural warming/cooling of the earth as it progresses through it's life cycle.  Effects of civilization on global warming may be measurable, but it is hardly signifigant when compared to the forces of nature and the tendency of our planet's temperature to fluctuate through ice ages and periods of warmer climes.
1167911
Science explains Global warming. More storms, bigger storms, carbin dioxide levels, soon crops may burn up before they grow, rain forest desease may spread, Gulf stream may stop, In Our Lifetime.\nIs a good read, go see... Times ARE changing.
1159556
actually, because of Global Warming, we would be in the ice age.  The increase in temperature causes a higher density of water vapor in the air, as a result the net temperature on the surface of the earth drops, and we get lots and lots of percipitation.  The Earth is making drastic attempts to shift it's self to remedy this.  Al Gore thinks we can control it because WE caused it, and so it would stand to reason that we fix it.
557880
Global warming is caused by an increase in greenhouse gasses in the atmosphere.  Global warming has been proven, the only people who argue against it have no understanding of science and no idea what is going on in the world.  Humans are not the only cause of greenhouse gasses, but we contribute to the problem greately.  The fact is that the earth cycles through warming and cooling periods but manking disturbs the normal process and increases the rate of warming (mostly by CO2 increases from burning oil.)  There are natural sources of CO2 and other greenhouse gasses as well, volcanoes can spew millions of tons of CO2 in a matter of days... the earth has supported life through very hot and very cold peroids, but there is NO realistic argument that humans don't influence global warming.\n\nThe greenhouse effect is necessary for life as well, if all of the CO2 was elimated from the atmosphere life as we know it on earth would end, the earth would be a frozen, barren wasteland.  Without any greenhouse gasses the earth would not maintain a reasonable temperature; nights would drop to -80 Celcius on the warm parts of the planet... \n\nThe earth will recover from all of the damage we do when we are gone... life adapts, species are eliminated every year, but no little coverage is given to the new species the are discovered every year... evolution is in progress, global warming is a change, not a destruction.
343314
Come to think of it, maybe yes in the long run....in the long run polar caps will melt moving huge chunks of ice which will cause earthquakes. Also, main cause of global warming is burning of fossil fuels which are obtained by mining and drilling up the earth, causing earthquakes.
983934
Global warming is caused by greenhouse gas emmisions, like CO2 and CH4, cheifly added by humans.\n\nCO2 is 30% higher than it has been for 650,000 years. Methane is 130% greater. These are two of the main pollutants humans put into the atmosphere in excess, and they are two of the primary greenhouse gases.\n\nLook at the 'hockeystick', which shows a dramatic warming since 1950 after a fairly stable climate for 1000 years. In fact, the 10 hottest years in recorded history have all happened since 1990, with 2005 being the hottest, and 2006 is shaping up to maybe break that record.\n(see links below)\n\nHow's that for proof of man's fault in this? There is ample proof, any real scientist will tell you that.\n\nThere has NEVER been an article doubting man's influence on global warming published in a peer-reviewed journal. A recent study of almost 1000 proved that.\n\nYes, the earth naturally heats and cools, but the rate and amount we are warming now is unprecedented in the recent geologic past. We are doing this, and we must stop it. This is not some political statement or rhetoric. This is science trying to educate a crass, ignorant public of the damage they are doing. The magnitude of temperature increase ALREADY is about 10x that of the 'little ice age' of the middle ages, and rate and amount are only going up. \n\nJust to be clear, glacial and interglacial cycles are mainly controlled by astronomical fluctuations, but we have a detailed record of the last 7 cycles, and what the climate and CO2 is doing now is way different and extreme. The rate of increase is much higher than in the past AND the value itself is much higher.\n\nHI CO2: \nhttp://news.bbc.co.uk/1/hi/sci/tech/4467420.stm\nHOCKEY STICK: \nhttp://news.bbc.co.uk/1/hi/sci/tech/5109188.stm\nGeneral climate stuff: \nhttp://news.bbc.co.uk/1/hi/sci/tech/3897061.stm
803430
Global warming is the observed increase in the average temperature of the Earth's atmosphere and oceans in recent decades.\n\nThe Earth's average near-surface atmospheric temperature rose 0.6 ± 0.2 °Celsius (1.1 ± 0.4 °Fahrenheit) in the 20th century. The prevailing scientific opinion on climate change is that "most of the warming observed over the last 50 years is attributable to human activities"[1].\n\nThe increased amounts of carbon dioxide (CO2) and other greenhouse gases (GHGs) are the primary causes of the human-induced component of warming[2]. They are released by the burning of fossil fuels, land clearing and agriculture, etc. and lead to an increase in the greenhouse effect. The first speculation that a greenhouse effect might occur was by the Swedish chemist Svante Arrhenius in 1897, although it did not become a topic of popular debate until some 90 years later. [3]\n\nThe measure of the response to increased GHGs, and other anthropogenic and natural climate forcings, is climate sensitivity. It is found by observational [4] and model studies. This sensitivity is usually expressed in terms of the temperature response expected from a doubling of CO2 in the atmosphere. The current literature estimates sensitivity in the range 1.5–4.5 °C (2.7–8.1 °F). Models referenced by the Intergovernmental Panel on Climate Change (IPCC) project that global temperatures might increase between 1.4 and 5.8 °C (2.5 to 10.5 °F) between 1990 and 2100. The uncertainty in this range results from both the difficulty of estimating the volume of future greenhouse gas emissions and uncertainty about climate sensitivity.\n\nAn 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 tornados. Other consequences include higher or lower agricultural yields, glacial retreat, reduced summer stream flows, 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, warming (and sea level rise due to thermal expansion) is expected to continue past then, since CO2 has an estimated atmospheric lifetime of 50 to 200 years. [5]. Only a small minority of climate scientists discount the role that humanity's actions have played in recent warming. However, the uncertainty is more significant regarding how much climate change should be expected in the future, and there is a hotly contested political and public debate over what, if anything, should be done to reduce or reverse future warming, and how to deal with the predicted consequences.
620355
Global warming refers to the increases in the average temperature of the Earth's atmosphere and oceans that has been observed in recent decades.
560609
Global warming caused by increasing holes in the o-zone. This is caused by pollution, such as car emmissions, and chlora-flora carbons.
863668
Global warming is NOT a "natural thing."\nYes, our planet all on its own, for various reasons, does go through cycles of warmer and cooler temperatures.\nHowever, in the last 150 years we have added many billions of tons of carbon in various forms (carbon dioxide in the air is the biggest problem) to the planet's ecosphere -- more than any "natural" cause in the history of the earth.  \nI very much want to leave a habitable planet to my children, so they can do the same for theirs.  That means reducing humans' artificial climate changes which are causing a runaway greenhouse effect -- which is NOT natural.\n\nThe earth isn't going to "die" naturally for another 4.5 BILLION years or so -- why are you so relaxed about moving that deadline up by 4.9999 billion years?\n\n"only" girl -- it's not a theory, it's well proven.  You should keep up with science.
1103551
Here is the problem with global warming.\n1.  We do not know that it is occurring.\n2.  Even if it is occurring, we do not know if the sun is to blame, like with the melting of Martian polar caps, or if it is planet caused.\n3.  Even if it is planet caused, we do not know if it is nature, like when Krakatoa and Helens blew, or man caused.\n4.  Even if it is man caused, we do not know if the overall effects of an increased growing season and farmland increase is a bad thing.\n5.  Even if it is bad, we do not know if we can reverse it.\n6.  Even if we can reverse it, we do not know if it is more economically efficient to adapt or to try to reverse it.\n\nBut think instead of wack a mole at chucky cheese you could play club a seal in alaska.  Could be fun.
329268
global warming is a designer cause like so many of the other causes that are being puffed up at your local Starbucks as we speak. Of coarse we want to be smart and clean about how we live.  Try punching in global warming and you will see that the real science institutions i.e. MIT. Cal Tech. etc. have this cause under junk science.  real scientist, I don't mean phd's who are looking for easy research money, will laugh at this notion that your weed wacker is warming the planet.
841601
Global warming is causing polar ice caps to melt, causing an increase in ocean levels. Recently, a stream that runs right to the north pole completely melted, and polar bears have been drowning. Also, storms will become more frequent and severe, and everywhere will get hotter. This means thatthe diseases and viruses common in tropical places will become common everywhere.
461799
First you have to define what causes global warming.  then you need to decide what of these variable are dependant or independant.  You could then chose one of the independend variables and try to design an experiment that shows how varying that variable causes a change in warming.  an example might be saying that CO2 causes global warming by increasing the insulating value of the atmosphere, you could then set up an experiment where an environment(a large sealed environment(5 gallon glass jug)  is set up to permit differnet concentrations of CO2.  Add a radiating heat source like a heat lamp and heat the closed environment,  measure the inside of the environment and then turn off the light.  graph how long it takes for the environment to return to ambiant tempeture.  increase the CO2 concentration and try it again.   It might be too difficult, but it shows the scientific process.  and you should get some good graph points.
1107357
Global warming caused by humans is a myth.  It has been debunked by scientist after scientist.  The reason the earth is in a "warming cycle" (the temp on earth has risen 1 degree in the last 100 years..1 DEGREE) is because the sun is hotter.  \n\nThe environment is the new "religion" of the left, both in America and abroad. They don't believe in God and hate America.
1115809
Global warming occurs naturally and is essential for life on Earth, but today, 99.5% of green house gases are caused by human energy industries, transportation, and commercial use.
1103116
GLOBAL WARMING/THE ENVIRONMENT IN GENERAL\n\nAny and I mean any environmental cause or approach must be grassroots in nature. Having PhD's talk about global warming and having those representing industry interests debunk these present theories is a high level and almost an entirely futile effort. Don't get me wrong, it is great that someone with Al Gore's connections and exposure is getting the word out. However, people are people they want to see results. \n\nYes, the expression is now trite but still true, "Thing Globally, Act Locally". Watching the sky over a city, town or even a more rural area become darkened by smog has local impact, people take note and actually see A PROBLEM. A problem that can measured in terms of air quality or perhaps an AIR QUALITY HEALTH INDEX like the one that the provincial government in Ontario, Canada is in the process of implementing. You can measure results (however small) in terms of air quality and the affect it has on the health care system (those with breathing problems, doctor's visits, etc). It certainly speaks to the advantage of a UNIVERSAL health care system (however, actually implemented) as it actually makes sense to improve the environment as it keeps people healthy (a humanitarian cause) and when health care it publicly funded it affects the public coffers when people become ill therefore it even makes better financial sense to keep the environment a top priority.\n\nPlus any approach must be entire with a complete overall plan (the big picture). Including recycling initiatives, energy solutions (alternatives/renewables can now present a real potential financial threat to the big oil companies and even power companies...), government involvement at all levels, public transit, greener vehicles in general (Hybrid, Hydrogen, Conventional electric, bio-diesel, ethanol), conservation in all energy arenas, ETC!\n\nEconomic viability is the real sell as many of these solutions are just that economically sensible (ensuring we look at the entire picture). Yes as more people use solar, wind and other renewable energy sources the cheaper the technology will get. Two of the newest billionaires have earned a large portion through renewables Solar (India I believe) and Wind (China I believe). Yes in many ways developing nations and economies will be the first and early adopters of such renewable tech as they are just building much of their infrastructure.\n\nSo what do we all need to do? GET INVOLVED ! Contact your local government about improving your recycling program, contact provincial/state/federal government about the adopting of these new technologies (renewables such as solar/wind), buy gas with ethanol in it and demand it, use and demand bio diesel, buy products with less packaging and demand manufacturers to reduce packaging and to offer a price break as a result. More ECONOMIC VIABILITY! After all energy diversity just like economic diversity is the safest and best bet for good long term results and return on investment.\n\nJoe...\n\n\nKEEP IT UP MR. GORE THE POLAR BEARS NEED YOU FIRST **GRIN**.