To ease Mexico City's water woes, look up, study suggests

For Mexico City's biggest businesses and its poorest neighborhoods, rainwater harvesting could help address an enormous water crisis plaguing the city, a recent Columbia Water Center study found. Although critics often contend that rainwater harvesting is not cost-effective in the short-term, the researchers used a new methodology to calculate whether the approach would yield cost savings over 10 years for specific buildings and boroughs in Mexico City and for the city as a whole.

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