Sorry for breathing...

Half of the global population resides in cities, facing air quality issues. Air pollution is a major health threat, causing 3 million deaths annually, mostly in developing countries. Nitrogen dioxide, a dangerous pollutant from car emissions, reduces lung capacity and life expectancy. London has the highest nitrogen dioxide levels in Europe, with Oxford Street being the most polluted. The worst time for exposure in London is 10 AM.

What percentage of the world's population currently resides in urban areas?

• 90%

• 75%

• 50%

• 25%

How many people are estimated to die annually due to air pollution?

• 1 million

• 2 million

• 4 million

• 3 million

Which pollutant is primarily emitted from car exhausts and poses significant health risks?

• Ozone

• Carbon monoxide

• Sulfur dioxide

• Nitrogen dioxide

What is one of the health impacts of inhaling high levels of nitrogen dioxide?

• Enhanced growth

• Reduced lung capacity

• Increased life expectancy

• Improved lung function

Which city has the highest levels of nitrogen dioxide in Europe?

• Paris

• Berlin

• London

• Rome