Fact: the Earth naturally goes through alternating periods of heating and cooling and has done so for billions of years.
Fact: we are literally still in one of those cooling periods right this very second (the Quaternary glaciation) and the Earth is currently cooling.
Fact: the measurements used for the graphs that support global warming are taken in and around cities, which obviously produce a lot of heat, get hotter as they expand, and are known as "urban heat islands" for a reason.
Fact: water vapor, not CO2, is the largest contributor to the Earth's greenhouse effect.
Fact: there is financial incentive in the form of grants for scientists and researchers to support the theory of global warming.
Fact: there has been scientific consensus on dozens of climate-related doomsday scenarios over the past fifty years that should have happened by now. None of them have come true.