From Alternet: For the first time in scientific history, however, climate scientists have not only reached a near-unanimous consensus that human-made global warming threatens humanity, but have formed a global organization—the Intergovernmental Panel on Climate Change—to try and prevent it. Their most recent report states: "Warming of the climate system is unequivocal. Eleven of the last twelve years (1995-2006) rank among the twelve warmest years in the instrumental record of global surface temperature [since 1850]. ... [Climate change], together with sea level rise, are expected to have mostly adverse effects on natural and human systems [including] ... increased risk of deaths, injuries and infectious, respiratory and skin diseases ... water and food-borne diseases; post traumatic stress disorders ... increased risk of deaths and injuries by drowning in floods; migration-related health effects." LA's "heat island" effect is discussed here.
See this article at Grist It talks about the capitalist system's denial of the consequences of unfettered growth and pollution.
A response to this - Regeneration, Not Recovery - emphasizes that the regeneration phase of the adaptive cycle on the environmental issues can begin to solve this as well as provide the payoff that capitalism is looking for. See the article here, by Chip Ward.