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Q: Which two chemicals, acted upon by sunlight, form ozone in the atmosphere? A.volatile organic compounds and sulfur dioxide B.volatile organic compounds and nitrogen dioxide C. chlorofluorocarbons and
sulfur dioxide D. chlorofluorocarbons and nitrogen dioxide
A: Ozone occurs naturally in the stratosphere and is produced and destroyed at a constant rate. [ [ But this "good" ozone is gradually being destroyed by manmade chemicals called chlorofluorocarbons (CFCs), halons, and other ozone depleting substances (used in coolants, foaming agents, fire extinguishers, and solvents). These ozone depleting substances degrade slowly and can remain intact for many
years as they move through the troposphere until they reach the stratosphere. There they are broken down by the intensity of the sun's ultraviolet rays and release chlorine and bromine molecules, which destroy "good" ozone. One chlorine or bromine molecule can destroy 100,000 ozone molecules, causing ozone to disappear much faster than nature can replace it. It can take years ] ]
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User: Which two chemicals, acted upon by sunlight, form ozone in the atmosphere? A.volatile organic compounds and sulfur dioxide B.volatile organic compounds and nitrogen dioxide C. chlorofluorocarbons and sulfur dioxide D. chlorofluorocarbons and nitrogen dioxide

Weegy: Ozone occurs naturally in the stratosphere and is produced and destroyed at a constant rate. [ [ But this "good" ozone is gradually being destroyed by manmade chemicals called chlorofluorocarbons (CFCs), halons, and other ozone depleting substances (used in coolants, foaming agents, fire extinguishers, and solvents). These ozone depleting substances degrade slowly and can remain intact for many years as they move through the troposphere until they reach the stratosphere. There they are broken down by the intensity of the sun's ultraviolet rays and release chlorine and bromine molecules, which destroy "good" ozone. One chlorine or bromine molecule can destroy 100,000 ozone molecules, causing ozone to disappear much faster than nature can replace it. It can take years ] ]
Expert answered|mommy2fourkidz|Points 5|

User: Increasing the use of nuclear power and planting trees in urban areas are two methods of reducing atmospheric levels of what gas?

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Asked 5/15/2011 9:13:29 PM
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What is the leading cause of water contamination in countries without water treatment plants?
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Updated 8/11/2015 8:37:35 AM
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Sewage is the leading cause of water contamination in countries without water treatment plants.
Added 8/11/2015 8:37:35 AM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [8/11/2015 8:55:25 AM], Rated good by jeifunk
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