Hello Aspirant,

See green building is nothing but a normal building made up of green materials and the concept of green building is developed to construct the buildings with energy efficient structure, to save energy. Now those green materials are mainly :-

> Earthen Materials

> Wood

> Bamboo

> SIPs

> Insulated Concrete Forms

> Cordwood

> Straw Bale

> Earth Bags

> Slate/ Stone Roofing

> Steel

> Thatch

> Composites

> Natural Fiber

> Polyurethane

> Fiber Glass

> Cellulose

> Cork

> Polystyrene and isocyanurate

> Natural Clay

> Non- VOC paints

> Natural Fiber Floor

> Fiber Cement

> Stone

I hope this information helps you.

Good Luck!!