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: cutting down trees has a negative impact on an ecosystem. 
Fact 2: An ecosystem can be in a desert, a tropical jungle, an ocean or a pond.

Output: cutting down trees has a negative impact on a jungle.


Input: Consider Input: Fact 1: Coral reefs provide food and shelter to many ocean organisms. 
Fact 2: Oceans are important to life on Earth.

Output: coral reefs are important to earth.


Input: Consider Input: Fact 1: Ozone depletion results in higher levels of UV radiation reaching Earth. 
Fact 2: Ozone is represented chemically as O3.


Output: O3 depletion results in higher levels of UV radiation reaching Earth.