Haze doesn't just block the solar radiation. It is also infamous for acid rain and respiratory diseases.

The haze may have masked the effects of global warming across large parts of China, particularly in the central and eastern regions, where daily high temperatures have actually been decreasing. This may seem like good news, but any success China has in curbing emissions will accelerate the effects of global warming in those areas when the cooling mask is lifted.

Normally, more frequent cloud-free days should be sunnier and brighter but this doesn't happen in our study.

Most studies on acid rain have looked at the soil from one to 10 years or less, ... where we couldn't reliably quantify the chemical changes in the soil exchange complex.

If you fill the atmosphere with toxins, then you really cannot be surprised if the solar radiation transmission through it becomes toxic to humans.

When I was a kid, we never heard of smog, ozone depletion, acid rain, green house gasses.