Environmental Science

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Across
  1. 3. The intimate living together of members of two different species
  2. 5. Mechanical devices that use hydrogen or hydrogen-containing fuel such as methane to produce an electric current. Fuel cells are clean, quiet, and highly efficient sources of electricity
  3. 6. Scattered, diffuse sources of pollutants, such as runoff from farm fields, golf courses, construction sites, etc.
  4. 8. The land surface and groundwater aquifers drained by a particular river system
  5. 10. is any practice that reduces, eliminates, or prevents pollution at its source
  6. 13. Abandoned or underused urban areas in which redevelopment is blocked by liability or financing issues related to toxic contamination
  7. 15. preservation, protection, or restoration of the natural environment and wildlife.
  8. 17. A species that is abundant in parts of its territorial range,but has declined in total numbers and may be on the verge of extinction in certain regions or localities.
  9. 19. The irrevocable elimination of species; can be a normal process of the natural world as species out-compete or kill off others or as environmental conditions change.
Down
  1. 1. a vehicle that is powered by both an electric motor and an internal combustion engine.
  2. 2. a group of individuals of the same species occupying a given area
  3. 4. zone of air, land, and water at the surface of the earth that is occupied by organisms.
  4. 7. the role and position a species has in its environment;
  5. 9. An airshed is a part of the atmosphere that behaves in a coherent way with respect to the dispersion of emissions. It typically forms an analytical or management unit. Also: A geographic boundary for air quality standards.
  6. 11. A highly reactive molecule containing three oxygen atoms; a dangerous pollutant at ground level, but in the stratosphere, it forms an ultraviolet absorbing shield that protects us from harmful UV rays.
  7. 12. A species considered to be in imminent danger of extinction.
  8. 14. a naturally occurring group of native plants, animals and other organisms that are interacting in a unique habitat
  9. 16. The place or set of environmental conditions in which a particular organism lives.
  10. 18. A specific biological community and its physical environment interacting in an exchange of matter and energy.