If everyone on earth lived compactly we could all fit in Texas, or New Zealand.
If every person on earth stood side by side we would all fit in LA.
If you were to smash all humans and roll them into a giant meatball, it would fit inside the grand canyon or inside washington DC.
The size of the people on earth is very small compared to the size of the people on earth.
What about resources? We need to stop using fossil fuels. They eventually will run out. If its in 2 years 200 years or 3459234625469205434523 years, it's still a limit. There are other resources that we need to stop using, or just cut down on.
If we are wise with our resources, we can fit lots more people on earth.
Earth is God made, but it's been destroyed before, by meteors and super volcanoes. That's what happened to the dinosaurs.