Across
- 1. forms around cities where there is a lot of vehicle traffic
- 4. precipitation caused by excess atmospheric pollution
- 5. a type of renewable energy that uses photovoltaic cells to create electrical energy
- 6. a type of renewable energy that is heavily used in the coastal bend
- 8. a greenhouse gas that can be found naturally in Earth's atmosphere but has an increased concentration due to the burning of fossil fuels and the cattle industry
Down
- 1. a device that removes pollution including particulate and gases from the exhaust fumes of factories and industry
- 2. a radioactive chemical element that produces a colorless, odorless gas
- 3. small solids that may be removed from the air through the use of devices that use electrical power
- 4. a process the ocean is undergoing due to its uptake of carbon dioxide from the atmosphere
- 7. a type of renewable energy that uses the natural heat that can be accessed below Earth's surface