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.

Input: Consider Input: Fact 1: tectonic plates being pushed together causes earthquakes. 
Fact 2: Earthquake tremors and volcanic activity are frequent.

Output: tectonic plates being pushed together causes tremors.


Input: Consider Input: Fact 1: recycling reduces the resources needed to make something. 
Fact 2: Recyclability and recycling of materials is essential.

Output: It is essential to reduce resources needed to make things.


Input: Consider Input: Fact 1: Mollusks are a major food source for other organisms, including humans. 
Fact 2: Many organisms are omnivores with variable diets.


Output: Humans have variable diets and some consume mollusks as a major food source.