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.

[Q]: Fact 1: Soil can be depleted of nutrients. 
Fact 2: For the nonrenewable resources, depletion means extraction of the available natural resources.
[A]: soil nutrition can be extracted.


[Q]: Fact 1: fire converts chemical energy into light and heat energy. 
Fact 2: Fuel is considered a chemical energy.
[A]: Fuel converts into light and heat.


[Q]: Fact 1: Hormones are chemical messengers that control many body functions. 
Fact 2: Neurotransmitters are chemical messengers in the brain.
[A]:
Hormones and neurotransmitters behave in common ways.