USA Today: Human influence on the planet's climate is clear and having "widespread and consequential impacts on human and natural systems," some of which may be irreversible, says a draft report out today from a United Nations science panel.
"Warming of the climate system is unequivocal, and since the 1950s, many of the observed changes are unprecedented over decades to millennia," the report says. "The atmosphere and ocean have warmed, the amounts of snow and ice have diminished, and sea level has risen."...