Hi Shivi,
Green HR is a process that involves two main elements:
1. Environmentally friendly Human Resource practices.
2. Prevention of knowledge capital.
Green HR generally involves reducing the usage/printing of papers and minimizing paperwork. It also helps companies find alternative ways to cut down costs. It is said to be an employment model designed to assist industry professionals in retaining, recalling, preserving, and developing talent needed to ensure future business initiatives and strategies are met.
More @ [Green HR ~ HR to HR 2.0 and Human Capital (HCM)](http://strategic-hcm.blogspot.in/2007/07/green-hr.html)