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ICSE Class 9 Answered

<div> <p class="MsoNoSpacing" style="text-align: justify;"><span style="background-color: #ffffff;"><strong><span style="font-size: 12pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;" lang="EN-US">1.State the chemicals responsible for ozone layer destruction</span></strong></span></p> <p class="MsoNoSpacing" style="text-align: justify;"><span style="background-color: #ffffff;"><strong><span style="font-size: 12pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;" lang="EN-US">2.Name any two</span></strong></span></p> <p class="MsoNoSpacing" style="text-align: justify;"><span style="background-color: #ffffff;"><strong><span style="font-size: 12pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;" lang="EN-US">(a)Natural sources of atmospheric pollution</span></strong></span></p> <p class="MsoNoSpacing" style="text-align: justify;"><span style="background-color: #ffffff;"><strong><span style="font-size: 12pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;" lang="EN-US">(b)Gases which are responsible for the formation of acid rain</span></strong></span></p> <p class="MsoNoSpacing" style="text-align: justify;"><span style="background-color: #ffffff;"><strong><span style="font-size: 12pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;" lang="EN-US">3.Explain the term global warming.State two ways by which global warming can be reduced.</span></strong></span></p> <p class="MsoNoSpacing" style="text-align: justify;"><span style="background-color: #ffffff;"><strong><span style="font-size: 12pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;" lang="EN-US">4.State two effects of ozone depletion</span></strong></span></p> <p class="MsoNoSpacing" style="text-align: justify;"><span style="background-color: #ffffff;"><strong><span style="font-size: 12pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;" lang="EN-US">5.What is the cause of acid rain?Give any two impacts of acid rain</span></strong></span></p> <p class="MsoNoSpacing" style="text-align: justify;"><span style="background-color: #ffffff;"><strong><span style="font-size: 12pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;" lang="EN-US">6.Explain the methods of preventing acid rain</span></strong></span></p> <p class="MsoNoSpacing" style="text-align: justify;"><span style="background-color: #ffffff;"><strong><span style="font-size: 12pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;" lang="EN-US">7.State an advantage of CNG(Compressed Natural Gas)</span></strong></span></p> <p class="MsoNoSpacing" style="text-align: justify;"><span style="background-color: #ffffff;"><strong><span style="font-size: 12pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;" lang="EN-US">8.State how CFC break ozone layer.</span></strong></span></p> <p class="MsoNoSpacing" style="text-align: justify;"><span style="background-color: #ffffff;"><strong><span style="font-size: 12pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;" lang="EN-US">9.Describe the methods of saving ozone layer</span></strong></span><strong><span style="font-size: 12.0pt;" lang="EN-US"></span></strong></p> </div>
Asked by saif | 04 Jan, 2017, 04:38: PM
Expert Answer
Dear ksaif710@gmail.com

Thanks for asking us a question in Ask the Expert section of TopperLearning.com.

In case of multiple questions within a query, please post each question individually and let us know where you are getting stuck so that we would be able to explain things better.
 
Solution for your first query,
 
 
Chlorofluorocarbons (CFCs), Halons, Methyl Chloroform, Carbon Tetrachloride, Hydrofluorocarbons (HCFCs) and other halogenated ozone depleting substances (ODS) are responsible for ozone depletion.

Regards

Topperlearning Team.
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