Why pollution is not good for animal sex

Pair of common kingfishers (Alcedo atthis) ritual feeding. [iStockphoto]

The World Health Organisation (WHO) singles out air pollution as one of the greatest environmental threats to health, as it accounts for a high number of non-communicable diseases such as heart attack or stroke. 

There are at least seven million premature deaths annually due to the combined effects of outdoor and household air pollution recorded in developing countries, according to WHO.