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.

Example Input: Fact 1: Communities consist of populations of different species. 
Fact 2: Each species of animal is unique.
Example Output: Communities consist of populations of different animals.

Example Input: Fact 1: Protozoa make humans sick when they become human parasites. 
Fact 2: Protozoa Toxoplasma gondii Muscles Nematode Trichinella spiralis Protozoa Sarcocystis sp.
Example Output: Species of Sarcocystis can parasitize humans and make them sick.

Example Input: Fact 1: conserving resources has a positive impact on the environment. 
Fact 2: Use of resources affects the environment such as pollution.
Example Output:
conserving resources lowers pollution.