The 5 websites that help me the most

So here's the five most important websites that helped me the most in the exhibition:
1. en.wikipedia.org: Helped because it has a lot of information of green buildings
2. carbonsmart.com: Helped because it has a very good list of green buildings
3. usgbc.org : Helped because it says the standards for green buildings
4. greenschool.org : Helped because it shows an example of a green buildings
5. buildinggreen.com : Helped because it shows how you can build a green building