Answer: Bassically, certain gasses like CO2 (Carbon Dioxide) that come from stuff like burning fossil fuels and global warming, they heat up the earth, are wastes and are used as fuel.
C they want to keep the air cleaner so they will make it more efficient.
Answer:
i think its 1st option
<em><u>Ground</u></em><em><u> </u></em><em><u>water</u></em><em><u> </u></em><em><u>can</u></em><em><u> </u></em><em><u>come</u></em><em><u> </u></em><em><u>to</u></em><em><u> </u></em><em><u>the</u></em><em><u> </u></em><em><u>surface</u></em><em><u> </u></em><em><u>by</u></em><em><u> </u></em><em><u>natural</u></em><em><u> </u></em><em><u> </u></em><em><u>(</u></em><em><u>non</u></em><em><u> </u></em><em><u>man</u></em><em><u>-</u></em><em><u>made</u></em><em><u> </u></em><em><u>)</u></em><em><u> </u></em><em><u>processes</u></em><em><u>.</u></em>
If the area is getting direct sunlight the it will become hot. if an area isn't then it will be colder
