It is reported that the global temperature has been rising continuously for more than 150 years due to the massive emission of greenhouse gases by human beings. However, compared with 1970-1998, the rise rate of the global surface average temperature has slowed down significantly since 1999, and the rise rate of the average temperature has not been obvious in the past 15 years
UN climate experts pointed out that the concentration of carbon dioxide in the air is at the highest level in 800000 years.
the global warming is not so serious.