People say those reason is from CO2, but I denied that, it's nonsense.
The reson is car pollution, there small dust in air, those are the seeds of making gray clouds, and absorbs heat energy of the sun rays, and nearby air is warming.
That's the pure reason I inventer of Cyclone insist all car engine must be fix it,
as soon as possible. Let's protect our earth from spoiled, and preserve our nature along with our human kind.
Time wait no longer...............