Is Global warming caused by humans or part of a natural cycle?

Answer 1

CO2 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.

Look 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.
(see links below)

How's that for proof of man's fault in this? There is ample proof, any real scientist will tell you that.

There 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.

Yes, 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.

Just 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.

HI CO2:
http://news.bbc.co.uk/1/hi/sci/tech/4467420.stm
HOCKEY STICK:
http://news.bbc.co.uk/1/hi/sci/tech/5109188.stm
General climate stuff:
http://news.bbc.co.uk/1/hi/sci/tech/3897061.stm

Answer 2

Global warming is a natural cycle that has been sped up by humans. Before, in the past, temperatures have fluctuated by a few degrees, now it is on a much greater scale. Due to the amount of Carbon Dioxide we put into the air, we have sped up the natural process a great deal.

Answer 3

The truth? People are panicing because they think they are causeing it,.. What is trying to be pushed? That humans are speeding things up. Without Humans? What people fear has happened before,.. before Humans were around. Though there are some parts ot the Atmosphere there should be some concern about throwing out of balance,.. the only evidence being show is on cycles or changes day to day chaoticly.

So the only thing you should accept is " It's probably both".

Answer 4

Science has shown that the effects of global warming is a natural phenomonem and has led to ice ages. Mans part in all of this is to bring on the next ice age centuries before it would occur in nature.

Answer 5

global warming is caused by UV rays leaking out of the ozone layer. O3 or ozone is made of 3 oxygen atoms. UV rays are stopped by the ozone layer, but all the smog and pollution are breaking up the ozone layer. It becomes O + O2. UV rays can then come through and that causes global warming.
So we are responsible. Actually, it's kinda both.

Answer 6

its a natural cycle

Answer 7

It is all natural.