Urban heat island towers

There is a well-documented effect whereby cities suffer from higher temperatures known as the heat island effect. This effect, coupled with ground level ozone and other irritants in the city's are, make for a less than pleasant environment.

What I propose is that instead of endure this heat, we put it to work: In the middle of dense urban areas, construct a tower, which as airtight at the upper floors Hopefully, ten stories up shall give enough momentum, but more height can be added in bigger cities with greater needs.

In the tower, place a pool of water-- the water need not be very pure, I suspect seawater would work quite well. Have tubes go out to street level, with protective grates so children and rodents can't be sucked in.

Place a fan blowing upward at the top of the tower, so as to suck at the water-- suck the city air up through the water.

In the pool, have a thin grate, like a colendar, only flat, so that the air bubbling up through the water have higher surface area contact with the water-- this should reduce the airborn dust the makes it thru the process, and increase evaporation.

Basically, a giant humidifier, but the exit of the vapor will be high enough so as not to produce ground level humidity-- instead it will move heat upwards and away from the humans who don't want it.

Chemicals can be added to react with smog, or perhaps CO2, and the towers could be cleaned at night when it is cooler outside.

The transport of moisture might even be enough to form clouds, or at least significantly contribute to them, further cooling the ground level.

While the energy expended to suck the air away, the money saved by reduced air conditioning should offset some of the costs, and the layers of gunk which will build up should be enough to convince the public the air is being cleaned.

Hopefully the gunk won't be very toxic, and can find some commericial use-- or at least have some useful chemicals extracted from it. If seawater is used, there's always the salt at least.