I agree but how much is it warming? If you are familiar with Dr. Roger Pelke Sr.’s CLIMATE SCIENCE site, any “average” global temperature is skewed because many weather reporting stations are no longer in rural areas. City and suburbs with concrete and asphalt have grown up around these sites creating an urban heat island effect. I read recently a weather station in Los Angeles is being relocated to escape this factor. At least three stations in China are being moved because of recent, rapid urbanization surrounding them. If you read Steve McIntyre’s CLIMATE AUDIT blog you will find evidence that IPCC affiliated scientists are “adjusting” the historical climate record to conform with the UN’s vision.
It’s 90% certain that the warming since the 1980s is primarily human-caused.