U.S. Energy Information Administration - EIA - Independent Statistics and Analysis
Frequently Asked Questions
Does EIA report water vapor emissions data?
No. Water vapor is the most abundant greenhouse gas, but most scientists believe that human activity has a very small direct effect on its concentration in the atmosphere. Thus, EIA does not estimate emissions of water vapor.
Research by NASA suggests a stronger role from the indirect human effects on water vapor concentrations.
Last updated: September 20, 2012
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