Emissions are the release of pollutants into the air. They can come from natural sources, like volcanoes, or from human activities, like burning fossil fuels. Emissions cause air pollution, which can harm our health and the environment.
Most emissions come from burning fossil fuels, like coal, oil, and natural gas. These materials are made up of carbon and other chemicals that release pollutants when they’re burned. Burning fossil fuels is the biggest source of emissions in many countries.
Other major sources of emissions include:
• Agriculture: raising livestock produces methane gas, while using fertilizers releases nitrogen oxide gases.
• Manufacturing: making cement, steel, and other products emits harmful gases.
• Waste: decomposing garbage in landfills produces methane gas.
Burning wood for heat also emits pollution