Man responsible for Global Warming?

How can man be responsible for the temperature of a planet which has been here for over 4.5 billion years.  In that time, our planet has been ravaged by weather, meteors, volcanoes and other violent natural disasters.   Now our government is creating new laws and regulations and making us pay billions of dollars in extra fees.  This is junk science and politicians are using this junk science to take money from our pockets.  This is the kind of politics that is destroying the American way of life!