Alcohol abuse and drugs adversely affect the quality and quantity of sperm, reduce testosterone production and has contributed to erectile dysfunction. Drug abuse would reduce the density and the ability of sperm movement and increase the number of abnormal sperm. Moreover, it can lead to erectile dysfunction and loss of libido. Healthy living, adequate rest [...]
It has always been dangerous to work in mines. The roof may fall in and there are risks of flooding and explosion. Over the years, miners found that keeping canaries in the mines was a good early warning system. The birds were likely to die if there was a gas build up and this gave [...]

