One person can make a huge impact in the world, regardless of what we may think. The more people that try to generate change, the greater the impact will be.
While it may seem daunting to people with limited income or social standing, anyone can make ecologically wise choices. Many little tips and tricks are out there to allow people the chance to help out everyday. Most of these cost little money, and some may actually save money!
It's important for this generation to set standards for generations to come. Our society needs to think ahead and prepare ourselves to live in a sustainable lifestyle. It's for our good, and the good of the environment.
Let me refer you to my article written for the UWM Post and a video I have pieced together on youtube, linked on this page.
http://www.youtube.com/watch?v=buTsPIVIbYw (if you search sbklemm you will find it)
http://www.uwmpost.com/article/53/11/4032-Environmentally-sound
For more ideas, you only need to look and think outside the box. Best of luck.