There are apps for everything these days. Including this one: Nadia Whitehead from Verizon Wireless has some small things you can do to make a big difference.

"The Carbon3R sustainable app is available on the android market. This is a great for teachers. It actually gives you tips on how to reduce, reuse, and recycle.

"One neat tip it gives you about reusing is tips about bringing your own mug. It actually tells you each American uses 500 disposable cups every year, so there's tips and tricks in there to help raise awareness, and to help you create a better more efficient lifestyle.

"It's absolutely free, F-R-E-E!"