Our dependence on oil certainly isnt great, but that could be completely offset if everyone planted like 10-20 successful trees throughout their lives as well.

Honestly, I think the biggest environmental travesties of out time are deforestation of places like the amazon, plastic pollution of the environment (particularly the ocean) and factory farming (also known as CAFO's) which produces tons of methane and toxic sludge of blood and manure that the environment cannot handle.

If humanity does not change their ways I'll end up crying. I'd say we've got 20 years tops.