C'mon experts, EXACTLY what is Env. Res. ?

[Drake]

Haven't seen this answered yet, so I thought I'd weigh in on the matter.

From what I've seen so far, Env. Resis. only affect population growth. Every 10 points gets you 2% in pop growth, regardless of happiness or planet conditions.

I would think at the very least it should affect how much of a decrease to your max growth you get if the planet conditions aren't optimal, but that just isn't the case.

If anyone else has found something env. res. does besides the reproduction modifier, I'd love to know...