World challenge.

Byline: SURESH KUMAR,

Every individual is smitten in different matters, but the world's biggest challenge in the 21th century is the air pollution and it is the most serious threat to global health. It is estimated that air pollution is one of the fifth leading risk factors for mortality worldwide.

Around 7 million people become succumb of it globally. Also, the mortality and life expectancy reduction rates are affected by the air pollution. This is the factor that contributes more deaths than others, like malnutrition, alcohol use, and physical inactivity.

The main causes are responsible of it, indoor and outdoor air pollution. Indoor air is the fuel that is burned in homes cooking and heating that creates health problems, such as pneumonia, heart disease, asthma and cancer. On the other hand, outdoor air is energy sources, like...