f11f2692_limate_Science___ThinkProgress__One_Liner
[0] 43 [Skeptic Argument] “There’s no empirical evidence” [Paragraph] Direct observations find that CO2 is rising sharply due to human activity. Satellite and surface measurements find less energy is escaping to space at CO2 absorption wavelengths. Ocean and surface temperature measurements find the planet continues to accumulate heat. This gives a line of empirical evidence that human CO2 emissions are causing global warming. [One Liner] 
There are multiple lines of direct observations that humans are causing global warming.
99 One-Liners Rebutting Denier Talking Points — With Links To The Full Climate Science | ThinkProgress
One Liner