Science / Weather / Pollutant: Particles, gases, or liquid aerosols in the atmosphere which have an undesirable effect on humans or their surroundings. Something unfavorable to health and life that has been added to the environment MORE
Health / Disease / Hantavirus Cardiopulmonary Syndrome: A deadly disease transmitted to humans by infected rodents through urine, droppings, or saliva. Humans can contract the disease when they breathe in aerosolized virus. Although rare it has a high mort MORE
Science / Chemistry / Propellant: 1. A mixture of fuel and oxidizing agent that reacts to produce a high-energy stream of product gases that can produce thrust. For examples, see What makes a good rocket fuel? 2. A compressed gas used MORE