Author Question: What are the greenhouse gases and what percentage of the atmosphere do they represent? What will ... (Read 83 times)

ARLKQ · **on:** Jul 21, 2018

What are the greenhouse gases and what percentage of the atmosphere do they represent?

What will be an ideal response?

Question 2

In the United States, what methods are used to control automobiles hydrocarbon output?

What will be an ideal response?

jsm54321 · **Reply #1 on:** Jul 21, 2018

Answer to Question 1

ANS:
Gases that are known to contribute to the greenhouse effect include carbon dioxide, water vapor, ozone, methane, halocarbons, and nitrous oxide. They are often referred to as greenhouse gases. The combined volume of these gases is approximately one percent of all gases in the atmosphere.

Answer to Question 2

ANS:
Hydrocarbon output is controlled on automobiles by crankcase ventilation, exhaust gas recirculation, air injection, and such engine refinements as four valves per cylinder.