>We can't all go travelling, we won't fit in the same place and we'll boil the earth doing so.
Not every city is as famous as Venice. No, everyone can't go to Venice. Everyone can go somewhere, though.
> If we develop EV's and don't boil the earth, they won't all fit downtown.
Gridlock is a rounding error compared to air pollution. Sure, congestion is bad. But it doesn't deserve to be compared to the worst environmental crisis ever. (After all, studies showing induced demand are also showing that people choose to sit in traffic -- they can't hate it that much.)
> We can't all eat high quality meat as often as we want. We'll boil the earth and it'll require too much farmland, anyway
Lab-grown meat is an easy fix. We don't eat very much "high-quality" meat to begin with, at least, not most of us. Most of us eat Taco Bell, which is already only 30% meat or whatever.
> We can't all live in the country, that's not sustainable either.
No, but it's possible for a significant fraction to live in well-designed small towns. Obviously cities are necessary; we've never been without them. But you can fit a lot more people into three-story houses on 1/12 acre lots (33' by 110') than into one-story houses on half-acre lots. We have a lot of the latter these days. There's no need to jump all the way to small apartments in mid-rises on car-free streets. (But building some of these is good because there is clearly some demand from people who would like to live there.)
>But the idea that everyone should be able to do the same things implies a set of "things" very different from what, say, the middle class families on my suburban street do today.
I don't disagree with the general claim, but most people's predictions are far too dire. These problems are much more addressable than some people seem to think. They won't be, if population continues to skyrocket, but at current loading, the Earth will be okay.
(Unfortunately, some surveys indicate that people are choosing not to reproduce because they're unhappy. If we make those people happy, the population problem could come back. That's my greatest worry in the long-term.)