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The estimated coefficient of log of rainfall measures the total effect of log of rainfall on access to clean drinking water, including the effect of a change of the quality of water at watersheds. A statistically and economically significant estimated coefficient of log of rainfall suggests that local weather conditions matter for access to clean drinking water. SI Appendix, Table S4 shows the summary statistics of the main variables used in our analysis. The dataset indicates that 38% of households used unsafe water as their source of drinking water in 2000. In 2010, this percentage decreased to 17%. At clusters that are used for the analysis, the ratio of forest area decreased from 27.7% in 2000 to 22.2% in 2010. SI Appendix, Fig. S2 shows a histogram of changes in the ratio of forest area from 2000 to 2010. Although the mean of changes in the ratio of forest area is just 5.5 percentage points, there is a huge variation in the changes in this ratio. On the other hand, literature on the effect of deforestation on water in forest science and hydrology is contrary to the general perception . Reviewing 94 studies, Bosch and Hewlett summarize that an increase in forest area decreases the quantity of water in the streamflow. Reviewing 137 cases, Andréassian summarizes that deforestation results in an increase in water yield, and reforestation results in a decrease. Reviewing 308 study cases, Filoso et al. summarize that reforestation decreases the total annual water yield in 80% of the cases. These counterintuitive results of deforestation increasing the annual water yield are explained in the literature by the fact that trees themselves consume water, which is evaporated in the air, resulting in a decrease in the streamflow “dogs playing pool everything will kill you so choose something fun vintage poster”
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