IPCCのリーダー、スティーヴン・シュナイダー(スタンフォード大学教授)は、"Atmospheric Carbon Dioxide and Aerosols: Effects of Large Increases on Global Climate" (Science 173, 138-141)で、次のように述べた:It is projected that man's potential to pollute will increase 6 to 8-fold in the next 50 years. If this increased rate of injection[...] should raise the present background opacity by a factor of 4, our calculations suggest a decrease in glo