Question

nitrogen: the polluter
directions: read the sentence and fill (a) in the blanks with the appropriate words from the list below.
nitrogen - non (1) ____ and animal (2) __ have (3) __ many (4) __ as has acid (5) __, largely produced by the (6) __ in the (7) __ from (8) __ - generating plants and (9) __ from (10) ____ vehicles.

nitrogen electric emissions exhausts fertilizers
fossil - fueled manure polluted rain waterways

the nitrogen cycle © 1993 united learning, inc

Explanation:

Each blank is filled by matching contextually appropriate vocabulary related to nitrogen pollution sources and impacts:

1. Nitrogen-rich fertilizers are a key agricultural nitrogen source.
2. Animal manure is another agricultural nitrogen pollutant.
3. These two sources have polluted ecosystems.
4. Waterways are a common ecosystem harmed by nitrogen.
5. Acid rain is a nitrogen-related pollution outcome.
6. Nitrogen is the core pollutant here.
7. The atmosphere is a medium for nitrogen pollution spread.
8. Electric-generating plants emit nitrogen compounds.
9. Emissions are released from power plants.
10. Fossil-fueled vehicles are a major nitrogen pollution source via exhausts.

Answer:

1. fertilizers
2. manure
3. polluted
4. waterways
5. rain
6. nitrogen
7. atmosphere
8. electric
9. emissions
10. fossil-fueled