Well funnily enough humans are not the only living thing on this planet, but we act as though we are.
We breed like rabbits, build larger and larger cities, concrete over acres of land, build motorways all over the place, and generate so much rubbish we have to bury it in the ground or chuck it in the sea.
We continue to destroy natural habitats and make many animals extinct.
Now we could carry on like that, but where does it all end ?
For example, there will probably be no wild tigers in the world by the end of this century. Are you proud of that, because I am not.
The earth is the only planet we've got, and humans are gradually ruining it.
The environment (and over population) are two of the biggest issues we face, and we need to do something about it now.
So I am glad it is being pushed up the agenda.