Mould is a kind of fungus that contains small organisms found almost anywhere. They can be purple, white, orange, green, or black. Small amounts of Mould spores are generally harmless, but when they settle on a damp spot in your house, they can start to grow.
According to WHO the estimated outdoor air pollution causes 4.2 million premature deaths worldwide every year among the general population. Air pollution is a harmful substance in the air and a major risk to human health. It can trigger asthma, elevate coughing, decrease lung function, heart attacks, and stroke.