is global warming an effect caused my nature or man? or both?

Answer 1

Niether

Answer 2

This is a complicated and v controversial question! If you read the scientific literature, the overwhelming consensus is both, but that the recent extreme increase is caused by man. We're actually still coming out of the last ice age so, while in the shorter term temperature fluctuates according to things like sun spots and volcanic eruptions (if you ignore mans contribution!) the general trend is up. However, over the last 50 - 80 years temperature has increased exponentially (a lot!) and this correlates v closely to co2 emission. One of the reasons that this is such a controversial subject is that while most scientists agree, some (nearly all American) disagree, saying that it is only natural. Looking at their evidence closely makes it pretty obvious that there are major biases happening and their methods and stats are commonly pretty poor! In other words these are really biased and try to show that something is true when its not. Therefore, they are almost certainly politically motivated - the American Government (not that I've got anything against them, I'm just stating the facts) have a lot to gain from ignoring global warming. More recently they have begun to accept that this could be our fault so there has been quite a lot of scientific research published (again mainly American!) saying that global warming isn't going to affect humans badly, and in fact it could be beneficial! They argue things like it will increase crop yield, which it will if you live in a coolish country that's not about to run out of water!!! However, before we all panic with "day after tomorrow" fever - the UK met office say v clearly that the collapse of the gulf stream is v unlikely! Anyway, in answer to your question personally I'd say both, but some scientists and even more politicians will disagree!

Answer 3

'Natural' global warning has caused the Earth's average temperature to be a reasonably stable 33 degrees above what one would expect if we didn't have an atmosphere. It has been reasonably stable for about 10,000 years. The recent expected increase is predominantly from the man-made release of carbon compounds into the atmosphere, so total global warning is mostly natural, but the recent deviations are man-made.

Answer 4

Global warming is caused exclusively by the Sun.
Correlate sunspot activity over the last 500,000 years with temperature fluctuations and you have a perfect match.
Nuf said.
Except to ask if any politician (or anyone on here) has any idea how much CO2 is in the atmosphere. And when you tell them, and they realise that this minute percentage has itself increased by just 2% over the last hundred years, they might come to their senses.

Answer 5

It is caused by man because we has humans have the ability to affect the world in positive and negative ways. Humans cause many problems and humans need to be responsible for the environment and to take charge of problems, but many are ignorant and education is the key to nipping global warming in the bud!

Answer 6

The "greenhouse effect" is mostly natural and caused mostly by water vapor. It's essential to our civilization.

"Global warming" is excessive greenhouse effect mostly caused by man's production of carbon dioxide. It's very dangerous to our civilization. Rich countries will spend a huge amount of money coping. In poor countries many people will die of starvation due to damage to agriculture. We need to reduce man's contribution to the greenhouse effect.

More info here:

http://www.pewclimate.org/global-warming-basics/

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

Skeptics cite individually the few scientists who disagree. But the above is the position of the vast majority of climatologists, because of the data in my second website citation. Proof:

http://www.sciencemag.org/cgi/content/full/306/5702/1686

Answer 7

both..but its mostly natural because way before humans existed, global warming did take place and the temperatures were even higher than what they are now.

Answer 8

It's a natural cycle of the earth. There's a book that is either coming or has come that explains it quite well. I believe it's called something like "why we can't fix global warming" or something. You'll have to excuse my not-knowing cuz I'm preoccupied ;)

Answer 9

i dont know our weather records only go back 400 years so i dont know if this happend before in the earths history or not

Answer 10

Nature. Exclusively and only by nature.