don't know if anyone else watched grand designs last night where a couple where designing their own eco house from a farm building but this couple did not want to use cement as they claimed it is responsible for 10% of the worlds co2 emissions. I was rather alarmed at this high figure and wondered if anyone can comment on this as i don't even know how it's made or whats it's made of in order for this to happen. thankyou lovies xxx
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