Your fear isn't strange, but it's founded on only partial information.
Yes, the human population is growing and there are dwindling resources, the ones we're using, that is. There are many viable and potentially valuable resources which could be harnessed, but which aren't only because it's not profitable to the people who run the economic machine. The petroleum lobbyists pay billions of dollars to see that the fossil fuel industry is our planet's primary source of energy, keeping solar, wind and wave power in the background.
This Earth is capable of supporting a lot more life then we're led to believe. It's not so much that we're over-populated and that resources are dwindling, but that the world is managed in such a way that it keeps us struggling. And so long as the standard operating procedure is follow-the-money, it's going to stay that way.
If we can change the procedure to one which places the value of human life over the value of money, we'll have resources made available to us which will carry us for a long, long time, even WITH our growing population.
Our crisis is one of consciousness, not resources.