[thriftwy]

I'm not sure about that. USA has a lot of nature preserves and strict environment laws. 3rd world countries may experience runaway population growth where no land left undisturbed and nothing is preserved.

If we take CO2 it's another thing, but low emissions won't save you once all the biosphere is literally eaten.

[dominotw]

That has nothing to do with cost to earth. We just export our pollution to seas and china.

If all countries start living like americans we'd need 5 times the surfaces area of earth.

[thriftwy]

Preserving biosphere is precious. "Cost to earth" is meaningless by itself - the planet isn't going anywhere. The only fragile thing here is biosphere.

I can see that you don't actually value Earth, just pity that it's so small you have to ration it.