In this report, investigative reporters Vicki Monks and Howard Kohn explore how global warming - the greenhouse effect - can be slowed, and whether efforts now under way to reduce the concentration of heat-trapping gases in the atmosphere will be sufficient to prevent catastrophic climate change worldwide. By looking closely at one project - trees planted in Guatemala in an attempt to offset greenhouse gas pollution produced by a coal-fired power plant in Connecticut - this program raises questions of who must make the sacrifices that will be needed to protect the global environment, and whether the political will and international cooperation required can be mustered.