Air Pollution: Fix graph props; hack to make axis non-scalable
Air Pollution: Remove clouds
Air Pollution: Change pollution color
Air Pollution: Create new 2ndary pollutants occasionally
Air Pollution: Sun rays like Climate Change model
Air Pollution: Add sunlight slider, aim for ~25% conv rate

Also stopped sunlight from dying after hitting pollutant, to
allow for more conversion without requiring more sunlight
Air Pollution: Increase AQI to direct measure of pollutants
Air Pollution: Add rain slider; update rain cycle calc
Air Pollution: rm pollutant count
Air Pollutant: Add Variant 1; + ability to have no sunlight
Air Pollution: Add test into faster shape
Air Pollution: Add Variant 2
Air Pollution: Kill sunlight on conversion