All Natural Products

Now I don't mean a "green building" but what I mean is "building green"
I'm trying to work out a solution with my sister who forgot her reading text book at school and she needs the definiton of building green. What are some techniques in building green also?

could you please help me list materials that i would need to build a leed certified home.
also maybe;
1. list of energy-saving innovations
2. list of appliances (saving energy?)

What is Green building? Why we must concentrate on that?

If you had a limited budget, but were building a new house - what would some of the things you would do to make it as 'green' as possible? (Solar, low energy lamps etc)

1- How will it affect the average consumer?

i would really like some help answering this question please. i don't really understand. i know that the cost of going green is more expensive. but is it for a good cause?