An electric heater rated at 1000 watts (1 kilowatt), operating for one hour uses one kilowatt-hour (equivalent to 3.6 megajoules) of energy. A television rated at 100 watts operating for 10 hours continuously uses one kilowatt-hour. A 40-watt light bulb operating continuously for 25 hours uses one kilowatt-hour.
Ozone is a gas that occurs both in the Earth's upper atmosphere and at ground level. Ozone can be good or bad for your health and the environment, depending on its location in the atmosphere.
Ozone is a gas that is naturally present in Earthâs. atmosphereâone that has markedly different effects. depending on its location. At Earthâs surface, where. ozone comes into direct contact with life forms, it primarily displays a destructive side. Because it. reacts strongly with biological systems, large con-. centrations of ozone near the ground prove toxic to. living things.