Methane is a potent greenhouse gas with more climate warming effect than carbon dioxide, the main driver of global warming. (scientificamerican.com)
We now have many lines of evidence all pointing to a single, consistent answer - the main driver of global warming is rising carbon dioxide levels from our fossil fuel burning. (skepticalscience.com)
Knowing that human activities are the main driver of global warming helps us understand how and why our climate is changing, and it clearly defines the problem as one that is within our power to address. (ucsusa.org)