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1. What part does limestone play in a.farming b.building c.glass

2. what products use crude oil?

3. What is, and what are the effects of, global warming?

4. What is, and what are the effects of, global warming?

5. Why did the emission of sulphur dioxide: rise between 1850 and 1900? drop in the 1920s? rise in the 1940s to 60s? fall since 1970?

6. Why did the emission of sulphur dioxide: rise between 1850 and 1900? drop in the 1920s? rise in the 1940s to 60s? fall since 1970?

7. What are effects that the complete and incomplete combustion of hydrocarbons have on the environment?

8. Please may I have some information on glass for science report due in tomorrow?

9. We have to do a cartoon poster on the evolution of the atmosphere, and I'm a bit stuck on what exactly happened! Please could you help me with this?

10. Hi. I really don't understand about rock formations! We have to fill in a sheet explaining how different rocks have moved! Please could you explain this to me? Thank you!

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