I like the idea of only using sustainable energy, especially for vehicles. 
Is global warming real ?
Yes, global warming, and cooling has been documented by temperature data past few decades. 
I completely agree with you. Hopefully electric vehicles become more popular
Cutting down on methane emission is one of the best ways also easy and effective, that we can do.
How else could humankind reduce its carbon footprint?
One of the best ways to reduce carbon footprint, is to recycle and reducing waste. 
Ah yes, i recycle everyday. Do you?
Yes, everyone should recycle. I hope we can all chip in on helping the environment. 
Thanks for being aware of your own waste. Hopefully others can do the same