Mercury is emitted into air by A. Burning coal B. Burning garbage C. Coal fire D. Steam engine

The correct answer is: A. Burning coal.

Mercury is a naturally occurring element that can be found in the Earth’s crust, water, and air. It is also used in a variety of products, including batteries, thermometers, and fluorescent lights. When mercury is burned, it releases mercury vapor into the air. This vapor can be inhaled and can cause a variety of health problems, including neurological damage, kidney damage, and reproductive problems.

Burning garbage can also release mercury into the air, but this is not as common as burning coal. Coal is a major source of mercury emissions in the United States. In 2017, coal-fired power plants were responsible for