Use less cement if you can!

From Hippy Shopper
Global carbon dioxide emissions from the cement industry are greater than the entire aviation industry.
Lime mortar and plaster are the environmentally alternative to cement and their use is growing in ecological new builds. Calch Ty-Mawr Lime in Brecon, Wales is the Welsh Centre for Traditional and Ecological Building - basically they're experts in the use of lime as a building material. So if you are planning a green build, why not do our planet a favour and consider lime.