Data from more than 40,000 air quality monitoring stations in 138 countries, territories and regions were analyzed for the report, IQAir said.

Pollution is not something you think about when traveling. Flight tickets, luggage, and activities are what you usually focus on. But have you considered if your destination is one of the most ...

Some countries are known for having dangerously high pollution levels, poor sanitation, and large amounts of unmanaged waste. These problems are usually caused by overpopulation, industrial activity, ...

On the outskirts of Dhanbad, in India's Jharkhand state, heaps of coal are loaded onto a train car in August. India is the world's third-largest greenhouse gas polluter and relies heavily on coal for ...