Global Warming Essai

Hi! I'm new, I'm still waiting for activation via e-mail, so I write this massage as a quest.
I have no one who is competent to check my essay about Global Warming.
I tried to look for some help on my nationals forum, but nobody has given me answer.

Probably most of you are using english as a national language, so I hope that this will be even better verification of my essay than a grade given by my english teacher!

These days mass media are notoriously raising an issue of Global Warming. The fourth estate present global warming as an inescapable doom.
Beside worlwide problems like poverty, famine or warfare global warming is becoming the main subject, discussed by politics and the the most important problem which they are dealing with. Also the issue of global warming is notice by person on the street.
We are constantly aware about changes in atmosphere, theoretically caused by man's activity. The Governments are imposing newe regulations concerning reduction of greenhouse gases, production environmentally friendly products and development of renewable energy sources.
New restrictions apply also to production of eco-cars which suppoused to be supplied by hybrid or electric engines.
As a matter of fact man activity has insignificant influence on global warming.
In fact our climate is warming up itself and nearly whole events which accompany this proccess are apart from man's activity. This is not an opinion of mad scientist, it's opinion which represent many well-known and well-thought of man.
So we can reach the conclusion that global warming is only cold hoax, envented by media and some people who caould have lots of benefits, by making money on bird-brained idiots engaging in propaganda.
Still, there will be lots of people who will replace their petrol engined cars with electric imitations of cars, common ligh bulbs with new energy-efficent bulbs with higher price tag and shorter life expectancy.

I've written it by myself, probably there are many grammar failures and so on, but I hope you will get my point

Thanks in advance !

P.S. Feel free to correct me, I'm preparing to CAE Exam, so I hope posting here will be a valuable experience.