Combine the given two facts to write a concluding fact. Note that there should be some parts of the first and second facts that are not mentioned in this conclusion fact. Your combined fact should be the result of a chain between the two facts. Chains form when two facts connect together to produce a concluding fact. An example of a chain is: "pesticides cause pollution" (fact1) + "pollution can harm animals" (fact2) → "pesticides can harm animals" (conclusion fact). Parts of the concluding fact overlap with the first and the second fact. To construct such a  concluding fact, a useful way is to borrow the subject from one fact and the ending conclusions from another fact.
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Question: Fact 1: Ethanol is produced by alcoholic fermentation of the glucose in corn or other plants. 
Fact 2: Alcohol includes ethanol and methanol.

Answer: alcohol can make methanol.


Question: Fact 1: treating water is used to remove harmful substances before drinking. 
Fact 2: Chlorine is also used to treat water.

Answer: Chlorine is also used to remove harmful substances from water before drinking.


Question: Fact 1: most canyons are formed by flowing rivers through erosion over long periods of time. 
Fact 2: Geological erosion is natural occurring erosion over long periods of time.

Answer:
Most canyons are formed by flowing rivers through geological erosion.