What is the main cause of global warming man or nature?

Answer 1

Nature

Answer 2

In 1996 scientsts were fairly certain that global warming was accelerarting due to a variety of causes, principle among which was human use of hydrocarbons. They set up a way to evaluate their hypothesis and then refined the evaluation process in 2001. The prediction from the 2001 test was that human induced global warming would heat the planet between 1.5 and 3 degrees C within 5 years. The recently completed meeting in Paris confirmed that the earth heated up 2 degrees C in that time frame, well within the predicted range. There is therefore confidence that the testing methodology yields valid results.

Two degrees may not sound like much, but if we take 1950 as a base year, the earth went into a deep freeze and glaciers covered vast sections of north America when temperatures were just 3 degree C colder than the average temps in 1950. We live on a razor thin edged of livable climate. So a 2 degree temperature increase in 20-30 years is very alarming.

Remember that this change is AFTER natural variations in temperature due to a variety of causes, is factored into the equation.

According to scientists attending the Paris conference, the probability that humans are responsible for global warming runs between 80 and 99%.

There are things we can do now to slow or even reverse the heating process. If we do nothing, we sooner or later get to a "tipping point" where global warming is irreversible, earth surface temperature soars to at least 500 degrees, the oceans boil away and our little species goes extinct.

Venus is a good example of what can happen.

Answer 3

Man is the main cause of global warming. While it is true that we get closer to the sun every year it is a small change and would not be significant if man wasn't polluting the earth and putting holes in the ozone. There is a lot to prove it. We have caused acid rain, holes in the ozone, pollution, etc. People do not think about the consequences of their actions. Cutting down the forests. Killing species that help the planet. We do what is in our best interests now not what is in the best interest of those who will come after us.

Answer 4

Certain gases don't let the heat escape from the Earth's surface. It's like putting on an extra blanket or an extra sweater. If you put on a sweater, the sweater does not actually make any heat. It just makes it so that the heat from your body does not escape as easily.
The major natural greenhouse gases are water vapor, which causes about 36-70% of the greenhouse effect on Earth (not including clouds); carbon dioxide, which causes 9-26%; methane, which causes 4-9%, and ozone, which causes 3-7%. It is not possible to state that a certain gas causes a certain percentage of the greenhouse effect, because the influences of the various gases are not additive. (The higher ends of the ranges quoted are for the gas alone; the lower ends, for the gas counting overlaps.)[2][3] Other greenhouse gases include, but are not limited to, nitrous oxide, sulfur hexafluoride, hydrofluorocarbons, perfluorocarbons and chlorofluorocarbons (see IPCC list of greenhouse gases).

Millions of tons of crap DAILY into the atmosphere is nothing to sneeze at. Pun intended.

We are shrewing ourselves over for a buck.
Shooting ourselves in the herd.
Stepping on our own ducks.
Cutting off our nose to spite our finch.
Kicking ourselves in the asparagus beetle.

For the almighty dollar we're ruining it for everybody and everything, and people who deny it are three fries short of a Happy Meal.
Have a nice day.

Answer 5

The main cause of global warming is man. We do too many things to pollute the Earth and this is the main cause. We are far too populated and with the amount of vehicles that are driven on the roads today, there are too many emissions being put into the air. This doesn't include all of the pollution from the industries too. The ozone layer being destroyed is another contributing factor.

Answer 6

both humans and natural preturbances cause changes in climate -- trees and decaying vegetation, volcanoes, solar flares, changes in the magnetic fields under the earth's crust all affect the weather... so do all of these cars and power plants... humans are a part of nature, but because there are so many of us and we have these tools to engineer so many big projects, we have a greater effect on the environment than any other species... we can change the course of rivers, we can harness great amounts of heat and electricity, we can fly to the moon and fill our orbit with space garbage (enough that astronomers have trouble seeing stars through it all)... that much traffic and smoke and concentration of polutants is bound to catch up with us. The difference in temperature between living comfortably and the last ice age is only five degrees farenheit...it doesn't take much to upset the whole delicate balance.

Answer 7

Up until about 100 years ago it was nature. Since then, man has pumped orders of magnitude more greenhouse gasses and other pollutants into the atmosphere greatly accelerating global warming.

This is not conjecture. These are facts. As Al Gore labeled it, "An Inconvenient Truth".

Answer 8

Either "Hot Air" or "Chicken Little". Maybe even both...but flipped...The Nature of Man. Obviously man created the notion, like that Giant Asteroid that's going to eventually take us out, California's gonna sink into the Ocean, Nostradamus, Armageddon, etc., etc. hey...the only things in life that are certain..." Death and Taxes"!
People really need to start peeking behind the curtain, "Forest for the trees"?, " Believe half of what you see and Nothing of what you hear"?

The main cause..."Political" and "Media" born Hysteria.

Answer 9

gnorance causes global warming! people who think that global warming is a left wing propaganda to get votes. its obvious that what do effects the environment. if they think that the ozone is just opening up due to naturally causes then i guess we were wrong about cfc. lets put cfc back into the cans and spray it in the air.

it is partly natural, but we definitely caused what is going on today

Answer 10

Many people think global warming is natural. But their arguments are theoretical and lack hard data. They've been considered seriously by many scientists and rejected, on the basis of hard data. Here's some of the science involved.

The arguments about volcanoes are flat wrong, bordering on ridiculous. Volcanoes emit a tiny fraction of what man produces. And the dust they throw up cancels most of that out.

"a far greater amount of CO2 is contributed to the atmosphere by human activities each year than by volcanic eruptions. Volcanoes contribute about 110 million tons/year, whereas other sources contribute about 10 billion tons/year"

http://www.geology.sdsu.edu/how_volcanoe...

The IPCC report considered the measured values of solar variation, and it's nowhere near enough to cause the wrming. The total warming is 2.6 watts per meter squared. The solar increase is 0.12 watts per meter squared.

And the warming is far more rapid than any natural cycle could be.

http://www.ipcc.ch/spm2feb07.pdf...

Natural CO2 emissions may be more than man. But naturally produced CO2 is recycled by the "carbon cycle". Man is messing that up by digging up carbon the natural cycle buried over millions of years, and buring it very fast. Here's the data. The little squiggles are the natural cycle doing its' thing. CO2 goes down in the summer when plants are active, and up in the winter when they're not. The huge increase is us, burning fossil fuels.

http://scrippsco2.ucsd.edu/graphics_gallery/mauna_loa_record/mlo_record.html

The scientific evidence is overwhelming, which is why these people, who are not liberals, think it's real. You may or may not respect all of them, but surely you respect some of them.

"The science of global warming is clear. We know enough to act now. We must act now."

James Rogers, CEO of Charlotte-based Duke Energy.

"The overwhelming majority of atmospheric scientists around the world and our own National Academy of Sciences are in essential agreement on the facts of global warming and the significant contribution of human activity to that trend."

Russell E. Train, former environmental official under Presidents Nixon and Ford

"We simply must do everything we can in our power to slow down global warming before it is too late. The science is clear. The global warming debate is over."

Arnold Schwarzenegger, Republican, Governor, California

"Our nation has both an obligation and self-interest in facing head-on the serious environmental, economic and national security threat posed by global warming."

John McCain, Republican, Senator, Arizona

"These technologies will help us become better stewards of the environment - and they will help us to confront the serious challenge of global climate change."

President George Bush