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Author Question: What percentage of hydrocarbons found in the atmosphere result from human activity? A) 15 B) 35 ... (Read 91 times)

erika

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on: Aug 27, 2018
What percentage of hydrocarbons found in the atmosphere result from human activity?
 
  A) 15
  B) 35
  C) 55
  D) 75

Question 2

Most hydrocarbons in the atmosphere in rural areas arise from
 
  A) automobile exhaust.
  B) evaporation of gasoline.
  C) industrial emissions.
  D) natural sources.


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jonathanballen97

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Reply #1 on: Aug 27, 2018
Answer to Question 1

A

Answer to Question 2

D


erika

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Reply 2 on: Aug 27, 2018
:D TYSM

alexanderhamilton

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Reply 3 on: Yesterday
Gracias!

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