how much of global warming is caused by humans and technology?

Answer 1

Scientists have determined that 80-90% of the warming over the past 30 years is due to human greenhouse gas emissions.

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

Answer 2

It's not possible to give a precise answer. There is an underlying natural trend but we don't know for sure just how much warming this is causing. We can assign a maximum and minimum value and from this get a range. When all other factors are taken into account (and there are a lot of them) we get a figure which tells us that somehwere between 80 and 95% of the present global warming is manmade, the likely figure being close to the 90% mark.

There are other ways of calculating the contribution that humans are making, these give values anywhere between 60% and 99%, again with a figure in the order of 90% being the most likely.

Answer 3

The Earth has had ice ages, they were cooling periods, between them were warming periods. This has been going on for all of Earth’s 4 + - billion years. This all happened before any of the modern day technology came into being and will continue after we are gone.

The Earth is going through a pole shift right now. A pole shift is when the magnetic poles swap polarities. During pole shifts the magnetosphere is weaker and more of the Sun’s rays strike the Earth, this causes extra heating of the Earths surface, and makes global warming more pronounced.

These are natural cycles of the Earth. We puny stupid humans can no more stop or even reduce a natural cycle of the Earth, than the man in the moon. This is 9th grade science, and one would think that scientists and politicians would be better educated, but it seems that this not so, and they could remember 9th grade science class too.

This may just may be another smoke and mirrors propaganda campaign to cover our governments lies and con games. There are so many conspiracies running rampant it’s hard to tell which are real and which are just simple stupidity. The idea we can stop global warming IS stupidity at it’s highest form.


The whole aim of practical politics is to keep the populace alarmed (and hence clamorous to be led to safety) by menacing it with an endless series of hobgoblins, all of them imaginary.
Henry Louis Mencken (1880- 1956 )

Answer 4

I think most of it is cause by humans to that much technology
but it is most likely to be 30% of humans
iam learning about the global warming right now in school so I will get back to you when I find out the right stuff ?!?!

Answer 5

That's a misleading question. If Earth had no atmosphere, its average surface temperature would be quite a bit cooler. The atmosphere naturally keeps the temperature a little warmer and moderate. Compared to that difference, there have been small changes over the eons from various natural cycles. Now, all of a sudden, humans have injected a sudden and unnatural change into the atmosphere. It doesn't have to be a large temperature change as a percentage to wreak havoc with ecosystems. Seriously though, when's the last time the north pole melted entirely?

Answer 6

The worse activities on global warming are overpumping of underground water, deforestations, drainage which enlarge the deserts of the planet.

we could refeel with water all underground spaces of the continents to restore the climate in a better way even the green house effects.

Just follow the same level curves with water.

http://perso.wanadoo.fr/biefs.dupilat/

Answer 7

Much of it i would say....80%

Its good that humans invented, developed to great extents...but at the same time it wasnt understood that we are killing the earth natural atmosphere and resources

Humans were developing at the same time with the same pace they were deteroirating(???)

Invented atom bombs, biological bombs, raged wars with them....Creating chaos, pollution and long term affects both on human generations and atmosphere.

Earth is in evolving process. Yes, it is warming up but its a very very slow process and humans activities has catalyzed it to greater exponents.

Answer 8

Go see the Al Gore film - Inconvenient Truth. The number is shocking.

Answer 9

A great deal of it. We are going to burn every last drop of oil we can find regardless. Hopefully we can come up with something to replace it.

In the end it's only the poor people of the planet that will suffer. This is nothing new.

Answer 10

I agree with 80-90%