summary of nipcc’s findings on physical science #atmospheric carbon dioxide (co2) is a mild greenhouse gas that exertsa diminishing warming effect as its concentration increases.#doubling the concentration of atmospheric co2 from its pre-industriallevel, in the absence of other forcings and feedbacks, would likelycause a warming of ~0.3°c to 1.1°c, almost 50 percent of which mustalready have occurred.#a few tenths of a degree of additional warming, should it occur, wouldnot represent a climate crisis.#model outputs published in successive ipcc reports since 1990 projecta doubling of co2 could cause warming of up to 6°c by 2100. instead,global warming ceased around the end of the twentieth century and wasfollowed (since 1997) by 19 years of stable temperature.#over recent geological time, earth’s temperature has fluctuatednaturally between about +4°c and -6°c with respect to twentiethcentury temperature. a warming of 2°c above today, should it occur,falls within the bounds of natural variability.#though a future warming of 2°c would cause geographically variedecological responses, no evidence exists that those changes would benet harmful to the global environment or to human well-being.#at the current level of ~400 ppm we still live in a co2-starved world.atmospheric levels 15 times greater existed during the cambrian period(about 550 million years ago) without known adverse effects.#the overall warming since about 1860 corresponds to a recovery fromthe little ice age modulated by natural multidecadal cycles driven byocean-atmosphere oscillations, or by solar variations at the de vries(~208 year) and gleissberg (~80 year) and shorter periodicities.
"“america will never be a socialist country,” president trump said as he launched his bid for re-election last week. that declaration was an effort to frighten americans and undermine growing support for expanding medicare and social security—two popular programs that have long been derided as “socialist.” mr. trump’s declaration hypocritically ignores that he and his republican colleagues are the nation’s leading purveyors of an insidious form of corporate socialism, which uses government power and taxpayer resources to enrich mr. trump and his billionaire friends. when we defeat mr. trump in this election, we are going to end his corporate socialism and use those resources to create a 21st century economic bill of rights that benefits all people. consider the corporate socialism we’ve seen on wall street, where the high priests of unfettered capitalism reign. as you will recall, wall street’s deification of “free markets” went out the window in 2008 as they watched the financial crisis caused by their own greed and illegal behavior threaten the existence of some of the largest financial institutions in the country. suddenly, wall street became strong supporters of big-government socialism. they begged the federal government for unprecedented taxpayer assistance, and congress provided them with the largest bailout in history. the major banks received some $700 billion from the treasury and trillions in low-interest loans from the federal reserve."