Cars Whenever cars burn fossil fuels, they release a host of harmful chemicals. Carbon dioxide, methane, nitrous oxide and hydrofluorocarbon (often used in car air conditioners) are just a few of the gases that come out of vehicles’ tailpipes. These gases contribute to the formation of ground level ozone, which is one of the main constituents of smog. Ozone is a health hazard for everyone, especially for people with respiratory problems like asthma or chronic obstructive pulmonary disease, and heart and lung conditions such as emphysema. Power Plants The power industry uses a range of fuels to produce electricity on a large scale, including coal, oil and natural gas. Each type of fossil fuel emits harmful pollutants and contributes to the formation of ground-level ozone, which is an irritant that harms developing lungs and worsens asthma and other respiratory conditions. Emissions also occur during mining and extracting the fuels, as
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