When we hear about global warming these days, it’s usually about melting ice in polar regions or rising ocean levels, which has already had some disastrous effects. The global warming denialists continue to call it a “scientific controversy”, which it isn’t, and resist all efforts to halt or reverse human activities that may contribute to climate change.
Some scientists have speculated whether it’s too late to reverse global warming, since the earth has a strong positive feedback mechanism where as it gets warmer, things happen to make it even warmer. For example, ice reflects sunlight, reducing the amount of heat absorbed by the earth. As the ice melts, and is replaced by dark land or water, more heat is absorb, melting more ice, then absorbing more heat. Once the earth hits some tipping point, it may be impossible to reverse course.
(more…) «Consequences of global warming–healthcare»
According to a CBS report, the CDC has reported that the number of measles cases in the US in 2011 was the largest since 1996. In 2000, measles had been eliminated from the US, but that’s changed dramatically in the ensuing decade. There were 222 cases in the US in 2011, about quadruple the number in an average year.
(more…) «Measles–2011 measles outbreak largest in…»