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Greenhouse Effect, Ozone


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More Science Lessons (KS3)
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A series of free Science Lessons for 7th Grade and 8th Grade, KS3 and Checkpoint Science in preparation for GCSE and IGCSE Science.

Greenhouse Effect and Global Warming
The sun, greenhouse gases, the effects of fossil fuels on the carbon dioxide concentration in the atmosphere.
Tips to help against global warming are: saving electricity, recycling and helping plant trees.



The Ozone Layer
Ozone layer on the mend, thanks to chemical ban.
Restrictions on chemicals credited in ozone-hole shrinkage.

Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.


You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.


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