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Articles on Air pollution

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Bad air pollution and extreme heat each raise health risks, but they’re worse combined. Brian van der Brug/Los Angeles Times via Getty Images

Extreme heat and air pollution can be deadly, with the health risk together worse than either alone

The worst effects are during high nighttime temperatures, something happening more often with climate change. Wildfire smoke adds to the risk.
Indonesian fire fighters extinguish a fire in a land next to residence in Pekanbaru, Riau province on September 13, 2019. The blazes spread smog across Southeast Asia and adding to concerns about the impact on global warming. Adek Berry/AFP

New research reveals that wildfires can influence El Niño

Wildfires are intensifying, yet they’re one of the most poorly understood phenomena on Earth. New research shows that they can disturb both regional and global climate.
A farmer works with his tractor in front of the Kusile Power Station located in eMalahleni. In Gauteng province residents can sometimes smell the pollution coming from this direction. Wikus de Wet/AFP via Getty Images

The air in South African Highveld cities smells foul in the winter: here’s why

Johannesburg occasionally smells like rotten eggs. The wind brings the smell from the east or the southeast, where most industries are located.
Although it is important to have a diversity of tree species in urban landscapes, planting and protecting taller species should be strongly encouraged. (Shutterstock)

Large trees are essential for healthy cities

There is a growing interest in planting small trees in urban areas. However, large trees have significant advantages.

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