The greenhouse gases (nitrous oxides, carbon dioxide, methane, and water vapor) are responsible for trapping heat in the troposphere. The more of it we have, the more heat is trapped. As we all know, in reaction to heat; ice melts into water. Now imagine all of the sea ice on Earth melting.
That would be catastrophic to our environment. The sea level would rise 240 ft! That would flood coastal cities, like Atlantic City, Miami, New York City, Ocean City, Asbury Park, San Fransico, etc. So we need to reduce the amount of fossil fuels we use. If you use solar powered electricity, that's great! You have a great start. We can also reduce the amount of products from cows, like beef, hot dogs and so on.