Scientists who are proponents of catastrophic global warming now admit there has been no warming since 1998. They blame increased aerosol pollutants from China as being the reason why temperatures are cooling versus warming. Unfortunately, actual air quality measurements reveal the galactic bogosity of that claim. (click on charts to enlarge)
For example, U.S. air quality since 1990 has improved tremendously with vast reductions in air aerosols and particulates as the chart on left reveals. While aerosols/particulates over the U.S. were dramatically decreasing, the U.S. surface temperatures were falling as shown in the chart on the right.
The lack of warming due to increased aerosols is regurgitated lameness that "climate scientists" always attempt to fall back on when actual empirical evidence invalidates the AGW hypothesis. It's more bogus science from the 'Twilight Zone' of the climate science establishment.