A new take on concrete: Transforming CO_2 into building materials

摘要

Concrete is the single most widely used building material in the world - as well as one of the greatest polluters, contributing to more than 5% of the world's CO_2 emissions. This massive carbon footprint is driven largely by one key ingredient: cement, and the massive quantities of heat required to manufacture it. That's why five of the semifinalist teams competing in the NRG COSIA Carbon XPRIZE have created circular carbon technologies that use CO_2 emissions to make sustainable building materials which may be even stronger and more environmentally friendly than anything we've used in the past.