CALL me a converted skeptic.
Three years ago I identified problems in previous climate studies that, in my mind, threw doubt on the very existence of global warming.
Last year, following an intensive research effort involving a dozen scientists, I concluded that global warming was real and that the prior estimates of the rate of warming were correct.
I’m now going a step further: Humans are almost entirely the cause.
My total turnaround, in such a short time, is the result of careful and objective analysis by the Berkeley Earth Surface Temperature project, which I founded with my daughter Elizabeth.
Our results show that the average temperature of the earth’s land has risen by two and a half degrees Fahrenheit over the past 250 years, including an increase of one and a half degrees over the most recent 50 years.
Moreover, it appears likely that essentially all of this increase results from the human emission of greenhouse gases.
Much more at the link - this is a must-read for anyone interested in climate change, the environment, and the evolving Berkley BEST study by former skeptic and Koch-funded researcher Richard Muller.