Read here. The huge continental mass of the U.S. continues to exhibit significant cooling in the present. The proclaimed, "unprecedented" CO2-caused warming still does not exceed past known warm temperatures of the central United States and Canada.
"For a broad swath of the midsection of the United States stretching from the center of Texas all the way to the U.S. border with Canada (and probably some distance beyond), the supposedly unprecedented warming of the 20th century (according to claims of the world's climate alarmists) was not unprecedented at all, having likely been surpassed one thousand, two thousand and four to five thousand years ago, when there was much less CO2 in the air than there is today."