Karl, T. and Trenberth, K.E.
1999 Scientific American, Vol. 281, Iss. 6; pg. 100
Karl, T. and Trenberth, K.E., (1999), "The human impact on climate", Scientific American, Vol. 281, Iss. 6; pg. 100.
Abstract:
Scientists strongly suspect that human activity causes global warming, which in turn causes global climate changes that alter weather patterns and bring drought and severe storms. A commitment to long-term climate monitoring today could yield an answer by 2050.