Answer:
The given blank can be filled with few decades.
Step-by-step explanation:
The SLCPs or the short-lived climate pollutants remain in the atmosphere for a few days to a few decades, and they are the prime reason for global warming. The tropospheric ozone, black carbon, hydrofluorocarbons, and methane are all regarded as SLCPs, as these pollutants exhibit atmospheric lifetimes of a few days to few decades. These short-lived pollutants are responsible for 40 to 45 percent of global warming.