[exprA]

I wonder which has a bigger impact on human consumption levels: a person that decides to save his time by driving a car instead of waiting for a bus, or Africa's population increasing from 250 million in 1960 to about 5 billion by 2100.

Let's focus on the selfish car guy, that's the big picture all right in “saving” the world.

[rtpg]

Pour que no los dos?

The "selfish car guy" is why the American lifestyle consumes twice as much as the Japanese lifestyle. Everything gets built around it.

And of course there's the fact that the American lifestyle gets exported to other places as well.