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Is the Atmosphere Warming?

Simulations

This chapter dealt with a single big question and several related ones. The big question was, "Is the atmosphere warming?" Related questions include "What reasons do we have to suspect that the atmosphere is warming" and "What might cause the warming?" Theory and GCM computations point to an increase in air temperatures due to an enhanced greenhouse effect. The observational data also indicate a modest warming over the past 100 or so years. However, issues such as feedback and an imperfect data record make the problem a particularly difficult one to solve. As a result, it is not evident at this time that an enhanced greenhouse effect has caused the warming.

We reviewed scientists' projections of the impact of global warming on the natural environments and on human activities such as agriculture. Finally we considered some of the options we have to respond to the threat of global warming.

Simulation 1 (2131.0K)