air pollution

• Présence de substances nocives ou en excès dans l'atmosphère, telles que des gaz, des particules solides ou des molécules biologiques, qui présentent un danger pour la santé humaine, l'environnement ou le climat.

The presence of harmful or excessive substances in the atmosphere, such as gases, particulates, or biological molecules, that pose risks to human health, the environment, or the climate.

1. Contamination of the atmosphereB1formal

   The presence of harmful substances in the air, such as chemicals, particulate matter, or biological materials, that can cause damage to human health, the environment, and the climate.

   pollution de l'air

   • Air pollution in major cities often exceeds safe levels.
   • Burning fossil fuels is a primary cause of air pollution.
   • Wearing a mask can help reduce the effects of air pollution.

2. Environmental issueB2formal

   A major environmental problem caused by industrial and vehicle emissions, often addressed by government regulations and international agreements.

   pollution de l'air

   • The government introduced new laws to combat air pollution.
   • International summits often discuss solutions to air pollution.
   • Air pollution is a key concern for urban planners.