I feel a personal nostalgia for NASA, having been the Advance Technical Studies representative of the Guidance and Control Division at Jet Propulsion Laboratory many years ago. My work and publications in the area of unmanned planetary landers
It no longer matters whether radical climate change is the result of human activity or just a natural cycle, it is now way too late for us to make any significant difference. What is needed now is action to adapt to
Our ignorance and arrogance as a species has pretty much insured our demise in the not too distant future.
I believe that, to a large extent, our environmental ills are proportional to population. Unfettered population growth, on a planet with finite resources, is by definition eventually unsustainable.