Puzzled Environment

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Across
  1. 4. Energy content displayed in a food label
  2. 5. Color of the horrible herbicide used in Vietnam war
  3. 7. A radioactive gas found in all Iowa homes
  4. 8. Your city drinking water pollutants are monitored by
Down
  1. 1. 97% of all the Earth’s water
  2. 2. The leanest state in the US
  3. 3. The number of basic nutrient categories
  4. 6. The energy content in a gram of Fat