Coal-burning factories and increased automobile usage has caused the most significant increase in which of these? Soil depletion; water pollution; respiratory illness; nuclear waste

The most significant increase caused by coal-burning factories and increased automobile usage is likely air pollution, which subsequently leads to respiratory illness. Air pollution from the burning of coal and fossil fuels is a major contributor to the release of harmful pollutants such as sulfur dioxide, nitrogen oxides, and particulate matter. These pollutants can cause respiratory problems, including asthma, bronchitis, and other respiratory illnesses when people inhale polluted air.