IMO global warming is the primary issue presently facing the human race. Compared to the 1950's - 1970's period ,the human race is presently occupying is a considerably more difficult place to live in. The downward spiral appears to be quickening as illustrated by one prognosis on global warming: the world in 2050 could be a hot-house hell, with wars over limited resources, collapsing civilisation, failing agriculture, rising seas, melting glaciers, starvation, droughts, floods, mudslides and widespread devastation.
Once again, IMO, the foundation of our current mess is rampart breeding and over population. Simply having fewer babies would be a great start but, Mother Nature has designed us physically and emotionally to breed, breed and breed. Perhaps, in the big scale of things, the human race is simply a blip and it's extinction normal and predictable.