increased concern for forest resources, have enabled increases in productivity that have largely offset growth in demand. While … the record has not been quite as good in the developing countries, productivity growth and a slowing in the rate of …

&D attribution, the nature and length of the lags between research spending and its impacts on productivity, and various dimensions …

by changes in wind, I show that higher levels of particulate matter lead to decreased agricultural productivity, with … changes in productivity of 10 percent being common. Combining wind direction with the rollout of coal plants, results indicate … pollution from coal plants has a larger effect on agricultural productivity than other types of pollution. Given that the …