Surely you have read lots of interesting books about the environment, visited interesting "Green" web sites. Write a Review on the books/sites. Share your experience and your views with green friends across the world. 
Please keep your review brief, and do not forget to put in the title of the book, the author, the price, the language and from where one can purchase it. In case of the web sites don't forget the URL. To see if your review is posted on this site, do visit the site again.