Do you not have an answer?
In the third grade I learned in school that natural resources are not infinite, Robert. It was over 60 years ago, yet that realization continues to remind me that the actions of each individual can effect the health of the Earth. It’s a collective process. The EPA has some information: http://www3.epa.gov/climatechange/science/causes.html
What made you believe that Climate Change isn’t real?