The goal of green chemistry is to make the practice of chemistry safer and more sustainable. You can read about the definition and the principles of green chemistry from the ACS here, or check out the free GC3 introductory video from one of the founders of green chemistry here. Hope that helps, and let us know if you have other questions!
In Analytical Research also there is lot of scope to reduce wastage of laboratory solvents and new greener method
Apart from GC3, you can also get some ideas about how green chemistry transforms chemistry education from The Green Chemistry Commitment: http://www.greenchemistrycommitment.org/resources/webinar-series/