The question of global climate change--whether it is actually occurring and, if so, for what reasons--is one of the most controversial and contentious issues debated in the US today.  Public discussion gives an impression that there is great uncertainty over the matter even among scientists.  In reality, this is not the case. The unequivocal scientific consensus is that release of anthropogenic greenhouse gases into the atmosphere is among the principal causes of accelerated global warming.  I will discuss the evidence for this conclusion and what measures should be taken as part of an effective solution.