“There is a large body of science evidence from particular water utilities that urban water-treatment costs depend on the water quality at the city’s source, which in turn depends on the land use in the source watersheds. And there is a lot of anecdotal evidence from particular source watersheds that land-use has really degraded water quality.
But nobody had a good estimate of how significant this process was globally. How much has watershed degradation really increased water treatment costs for the world’s cities?
Our study, entitled “Estimating watershed degradation over the last century and its impact on water-treatment costs for the world’s large cities” basically focused on quantifying this one number…”
Read on at: Cool Green Science