Food running out isn't happening for quite a while or you could look at it this way..there is plenty of food on the planet the problem is this..the worlds governments manage food, land use , farming ect ect . If you mean resources like gas, oil , coal ect..there is always sun and wind and water. Deforestation of the rainforests is causing problems now and for future generations. I mean that you probably won't be alive when the world runs out of whatever you're worried about. Yes problems lie far down the road if things aren't addressed and fixed. Also a lot of people die every day from war, disease, starvation, accidents, murder, and old age so..
I honestly wish people were limited to how many kids they could have, like in China. People reproduce so fast there isn't going to be anything left for our future generations.