Is Global warming a man made Phenomenon?

I've heard so many sides of the story and I can witness it firsthand that Global warming is real. But there is a huge debate in the scientific community on whether it's a man made phenomenon or it's just the planet going through another phase before another ice age.

So people, what do y'all think?

yes.
god made nature and protecting it was in our hands.
we created pollution and heat that caused global warming.
in recent days an oil company cought fire in india.
over 40 lack thousand litres of petrol got burnt.
it caused a lot of pollution and even temperature difference in many cities near and far from there.
so who is responsible?
[SIZE=3]we...........[/SIZE]

some of it is god's rage and other is our fault.
wat say guys?

actually i think its not at all total man made phenomenon
many people are justifying polluting with there industries saying its just a man made phenomenon
people wont take serious action until they see some serious damage
its just our nature