Register
Which substance in the air of U.S. cities has decreased least since the Clean Air Act began? A. carbon monoxide B. ground-level ozone C. particulate matter D. sulfur dioxide
12.9k views
23 votes
Which substance in the air of U.S. cities has decreased least since the Clean Air Act began?

A. carbon monoxide
B. ground-level ozone
C. particulate matter
D. sulfur dioxide

User Ansate
by
7.9k points

1 Answer

6 votes

Answer: the answer is carbon monoxide

Step-by-step explanation:

hope this helps :)

User Iqbal S
by
8.2k points
← Prev Question Next Question →

Related questions

Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.5m questions

12.2m answers

Other Questions

At sea level, water boils at 100 degrees celcius and methane  boiled at -161 degrees celcius. Which of these substances has a stronger force of attraction between its particles? Explain your answer
Physical properties of minerals graphic organizer
A snowball is launched horizontally from the top of a building at v = 16.9 m/s. If it lands d = 44 meters from the bottom, how high (in m) was the building?
What type of rock is the Haystack rock (igneous, Metamorphic, or Sedimentary)
what is a device that transforms thermal energy to mechanical energy
Link Copied!