Fine ... they're plumes of condensed water vapor.
Rainfall will be measurably higher 20 miles downwind of a power plant.
Show me.
which is not water vapor at all but tiny spherical liquid water droplets that refract all wavelengths of light including infrared, very different than invisible water vapor. Water vapor has a net warming effect, most clouds a net cooling effect. That's a big difference.
Satellite Confirms Urban Heat Islands Increase Rainfall: mean monthly rainfall rates within 30-60 kilometers (18 to 36 miles) downwind of the cities were, on average, about 28 percent greater than the upwind region. In some cities, the downwind area exhibited increases as high as 51 percent.