Our planet is slowly dying. We are at the verge of extinction. This is because of wide spread environmental problem that was rooted from generations ahead of us and is only manifesting today.
Since the industrial revolution, gas emmission boomed and deplete our protective ozone layer. Today, we are making this effect more evident by contributing more pollutants to our planets.

On a simplier note, our needs is the greatest environmental problem. Because of these needs, we came up to things that will satisfy it but will destroy our planet.