Meteorologist: Heavy downpours are likely to become more frequent if Earth' s atmosphere becomes significantly warmer  A warm atmosphere heats the oceans, leading to faster evaporation, and the resulting water vapor forms rain clouds more quickly  A warmer atmosphere also holds more moisture, resulting in larger clouds
In general, as water vapor in larger clouds condenses, heavier downpours are more likely to result
It provides a causal explanation of the phenomenon described by the conclusion of the argument as a whole, but it is not intended to provide support for that conclusion.