1. Climate change,1990
2. Ozone loss will hit health and food, says UN study;Sinclair;New Sci.,1990
3. NOx emissions from coal combustion;Sloss,1991
4. Impact of anthropogenic activities on the global N2 cycle;Rodhe,1989
5. Atmospheric interactions—Homogeneous gas reactions of C, N, and S containing compounds;Crutzen,1983