According to the text, concrete is also a “climate-change villain” mainly becauseA.sand or
According to the text, concrete is also a “climate-change villain” mainly because
A.sand or gravel has to be used as an aggregate in the process of mixing.
B.the materials which are used to make concrete are not durable.
C.recycling of concrete is quite difficult when concrete breaks down.
D.chemical reaction in manufacturing cement emits carbon-dioxide world-wide.