How green is concrete?

~ Greencard for: concrete ~
	Weight:	25	Kg
	Lifespan:	50	Years
	Enegy to make:	25	Kwh
	Energy use:	0	Kwh per year
	Co2 footprint	25	Kg
	Chemical footprint:		Medium
	Waste footprint:	30	%
	Carbon offset:	1.25	Trees

Concrete is one of the most widely used materials in the modern world accounting for 3% of global co2 emmissions. Global production of cement in 2000 was 1.56 billion tons. Annual global production of concrete is about 4.5 billion cubic meters.

Lifetime embodied energy

During the life of a concrete structure, the concrete carbonates and absorbs the CO2 released by calcination during the cement manufacturing process. Once concrete has returned to fine particles, full carbonation occurs, and all the CO2 released by calcination is reabsorbed.

Factoids [1]

Concrete is the second most consumed product on the planet after water.

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