Satellite observations find that the amount of water vapor in the upper troposphere [ has increased over 30 years, as climate models predict global heating to cause. ]( http://www.theguardian.com/environment/climate-consensus-97-per-cent/2014/aug/13/global-warming-moistening-the-atmosphere )
Ссылка: https://stallman.org/archives/2014-may-aug.html#14_August_2014_%28Water_vapor_in_the_upper_troposphere_has_increased%29