I don't know if it'll be in 30 years, but it's coming. The trash over flowing, the water levels raising at alarming rates. The world is surely on its way to an ending.
I will not be surprised if all this happens in my lifetime. I'm 30, and I think I have a good enough of time left. The effects are getting worse faster as time goes on.
It can happen anytime. It may be by natural catastrophe or by disease. It can happen tonight, or yeah, maybe by 2050. At the rate we're making trash, anything is possible.