The only people who think you can accurately plan more than 50 years ahead are environmentalists and economists in the heads of environmentalists.
But if we got everyone to first world conditions we still could be using mined fertilisers in 1000 years, along with using fossil fuels to run the planet in a fine utopia.
Of course I and a lot of others want to be visiting space in decades. Along with the population will start to explode again in decades. And lots of other things like traveling to the nearest star within 1000 years would take a lot of fossil fuel using current tech.
I disagree that it's not worth thinking about the next 1,000 years, but I think you're right that right now we can't realistically plan more than 50 years ahead.
But if we got everyone to first world conditions we still could be using mined fertilisers in 1000 years, along with using fossil fuels to run the planet in a fine utopia.
Of course I and a lot of others want to be visiting space in decades. Along with the population will start to explode again in decades. And lots of other things like traveling to the nearest star within 1000 years would take a lot of fossil fuel using current tech.
1000 years is a pointless thing to think about.