Do you believe that Science has proven that humans are contributing to Global Warming or do you believe that Global Warming is false?

Most Scientists insist that Global Warming is real & the melting of the earth’s glaciers seem to support this, plus our increasingly erratic weather patterns do appear to be tied to human pollution of our eco-system. However, a lot of people deny that Global Warming is real & state that even if Global Warming might actually be happening – that humans have nothing to do with it. Where do you stand on this very serious issue that may (or may not) be facing our planet & its human population? I would like to know the reasons that you do (or do not) believe that Global Warming is happening.