Light Pollution
This piece on Hong Kong’s out of control light pollution is a good reminder of one of the least controlled means of pollution. While maybe it isn’t as damaging as water or air pollution, humans have made evolutionary adjustments for night and constant light could potentially have long-term damage on human health. In the short-term, the absence of night can be devastating for many animals, as we may well be seeing in the Hong Kong area with fireflies and other insects.