North American temperature has increased a little over the last 100 years. Because winters are less cold, fall and spring are a bit longer and a bit milder than a 100 years ago. According to NASA, clouds both warm and cool the earth. NASA expects more clouds in the future, yet aren’t completely sure. And, CO2 is major plant food.
Links for sources for above data.
The Vikings and Roman find here here or here
Roman Climate Optimum here here here here
The National Oceanic and Atmospheric Agency NOAA 1895 to 2020 North American temperature graph here
NASA Clouds warm and cool the earth here here here
NASA greener world here
