l fans of cement think that it is the second widely used substance on the planet after water. - however, they are also polluting because many harmful things form when concrete is made, producing CO2 l European have restricted the cement emission. - although the biggest concrete firm agree to cut it emission , they are getting worried because the demand of concrete is growing l Some example and result of the emission condition of the three biggest concrete company l Three procedure that can cut the emission of CO2 l This three methods have limits. -there is little room for the improvement of efficiency -substitution of fuel is hard to find and harmful chemical might be another issue to consider -the limit of building codes l These measures only make marginal benefits. Many countries increase in emissions and some countries buy emission from other countries l Cement firm can not alter the co2 in the process of cement making and they figure out a way to bury it underground. They also invent more efficient and powerful concrete and argue that building can be more energy-efficient. l DSG support this proposal but they think the cement need to be replaced. Many attempt are processing but none has been successful yet
|