Pollution has been of majorpublic attention in the late1950 s and the early1970 s.There are three main types of pollution they are air, water and soil.
Air
Air is the thing that balances the earth.To much oxygen or carborn dioxide could be disastarous.Veichles countribute nearhalf of the world total.global warming which is now a top seminar subject,is also a reason for us to get scared.Factories contribute next for co2.
1 comment:
not bad!
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