Page 150 of 157« First...102030...148149150151152...Last »

About alex

British cartoonist and writer, living in the Basque Country, but based in New Zealand.

Eco-cement

I was reading an interesting Treehugger article about more environmentally-friendly concrete this week. Concrete from Portland cement produces a lot of carbon dioxide in its manufacture, but is very useful as a heat sink for passive solar heating. Now it looks like there is a very real alternative to Portland cement in the form of “E-crete” made from fly ash – a by-product of burning coal and something that is currently hard to get rid of. Buildings made from this stuff have lasted a very long time and the production means an 80-90% reduction in carbon emissions. (more…)

Page 150 of 157« First...102030...148149150151152...Last »