Charles Siegel

The U.S. Fish and Wildlife Service is reviewing evidence that global warming threatens the survival of the polar bear; if it is declared a threatened species, the U.S. might have to limit carbon dioxide emissions.

Scientists addressing the Alaska Forum on the Environment described melting ocean ice, thawing permafrost, and unhealthy forests as effects of global warming.

The new city plan for Madison, WI, "turns suburban sprawl on its head" by making infill and new urbanism the official city policies.