Arizona is [ hitting record temperatures ]( http://thinkprogress.org/climate/2014/07/25/3464391/phoenix-temperature-records/ ) , even at night. One of the effects of greenhouse gases is to prevent the ground from cooling off at night by radiating infrared into space.
Ссылка: https://stallman.org/archives/2014-may-aug.html#28_July_2014_%28Record_temperatures_in_Arizona%29