Note to Ridgerunner, re: Greta Thunberg :
You're just a very old indoctrinated fool. Mmmm, I wonder which is better. Let's just see. You've had a lifetime and then some to make use of your learning abilities, but judging from your participation in this topic, you've blatantly squandered your life's time on this Earth and learned very little worth passing on.
Greta, on the other hand, is just starting out. She already knows more about not only climate change, but life in general than you'll ever get the chance, again, to learn.
And BTW, where are your academic credentials to prove she's not an expert in anything?