If the entire world adopted ‘green’ forms of energy tomorrow, how long would it take for global temperatures to stabilize? The answer is a good 50 years: even if we "pull out all of the stops" there is little we can do to diminish the impact of climate change during the first half of this century. But choosing to adopt the right technologies now should stabilize the climate by the second half of the century, according to a new study.And, of course, we are seeing more and more extreme weather all over the world. See this, this, this, this, and this.
Because of the extremely long delay from cause to effect and the addiction of capitalist ruling classes to the continued use of fossil fuels, I am very concerned that humans are capable of recognizing the threat of climate change in time to do anything effective about it.