Don't worry. Magically awesome, yet uninvented, or in perpetual "in the next ten years" state technology, with Star Trek scope, will save us with a technical solution. If not, we're all just going to Mars in 10-15 years, with colonies and terraformings. Even if we haven't managed to even get back to the moon for 50 years.

That's what everybody insisted for the past 20-30 years, so must be true. All we need to do is keep expanding consumption/production!