The challenges are the energy security and climate change consequences of our dependence on fossil fuels, and the opportunity to revive and expand one of our key industries through a transition to electrification. (calcars.org)
Thus, to arrive at 430 to 450 ppm by 2050 — a plausibly achievable «safe» level in terms of its likely climate change consequences, but only 50 to 70 ppm more than the current one — cumulative emissions should be kept to roughly 750 to 1,050 billion tons, or roughly 20 billion tons a year. (scientificamerican.com)
One reason for our inability to better define climate change consequences is explored in a recent article in the Bulletin of the American Meteorological Society, and that is our inability after some 30 years of research to understand the likely climate response in the tropics and in polar regions. (giss.nasa.gov)