Why would it be important to look after our environment?

Question

I want to know why is it so important to look after and conserve our Earth and environment?

I need 3 points/reasons with backup info and examples.

Similar to a short essay type

Answer 1

Well just cause it is.

Answer 2

I could write you a whole page but it sounds like you want me to do your homework for you.  How are you going to learn if you don't start studying and thinking for yourself.  The enviorment is like the house you live in.  I do hope you keep it clean and in order.