So firstly, please, please take the time to go and watch:

http://www.storyofstuff.com

.. some of it everyone knows, but it’s still worth understanding all of it.

Once that’s given you the picture you need to get an idea of how it’s going to get fixed. Here’s a good source where you’ll learn how the little fella pictured (A tardigrade, or “little water bear”) is helping prevent killer diseases in Africa without using up the earths resources (amongst other things).