Alarmists have been saying for centuries that we will run out of natural resources. We always manage to find more or use the current ones we have much more efficiently including recycling.
It is too early to say we are in the space age but hundreds of years from now we could mine the asteroids beyond Mars’s orbit that are extremely rich in materials that will prove useful. This includes countless metals, including precious metals.
As far as removing all the trees, some nations including China are planting two trees for every one cut down. It’s the nations like Brazil that are the problem.
In the United States there had been talk of building factories which do nothing but clean the air (funded by the government), but do you know who has used the political process to block it? Yes, it was the environmentalists. They are also against nuclear power to generate electricity like France is so reliant on. Nuclear energy emits no climate warming gases.
The problem is not the far future. The problem is now and the near future. If all climate changing emissions were stopped cold the atmosphere would clear itself within two hundred years.
trees take decades to grow to the point climate is affected, and its not just about planting trees, it needs to be a a variety of trees. A rainforest can have 700 different species of tree and I doubt countries like China are doing that, they are likely just planting trees they want to harvest again. David Attenborough'Netflix "a life on our planet" really shows the extent of damage humans have done. Yes people have been saying this for decades but that doesn't mean its not happening. in his lifetime the population went from under 2 billion to nearly 8. In his lifetime he has witnessed forests go from 60 percent to 31 percent.
only an ignorant person believes things can continue without consequence. In the next 300 years our population will result in the next mass extinction. forests will be largely gone, diversity in wildlife obliterated, bees will be gone and mass starvation and war inevitable.
the earth is barely supporting 7.5 billion people, how can it possibly support 10+ billion.
moving onto our oceans. Scientists estimate by 2048 there will be so few fish left that fishing boats won't be able to fish. 70 percent of our oxygen comes from oceans. destroying the oceans ecosystems means disaster for the world.
scientists drilled 3 million years ice cores from Antarctica. They found it has melted and frozen 60 times in that period. While this shows a luch longer earth cycle, mankind have accelerated it by thousands of years. The oceans around the world rose by 23 feet when it happened and this will displace all civilization at coastal regions.
so to sum it up, we don't have hundreds of years. If left unchecked, in 300 years time the 6th mass extinction will be well underway.