Some gases from the air originate from volcanic eruptions. Volcanic eruptions eject gases from the inside of Earth. The most typical fuel emitted by volcanoes is drinking water vapor. Other gases, including carbon monoxide and sulfur dioxide, are harmful to most organisms. [ I/T ] to let air from outside https://codyvocqf.blogginaway.com/38208914/helping-the-others-realize-the-advantages-of-air-conditioning-systems