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: fossil fuels are formed from dead organisms over time. 
Fact 2: And that energy is generated by burning fossil fuel.

Output: Burning dead organisms can create energy.


Input: Consider Input: Fact 1: Macroevolution is evolution over geologic time above the level of the species. 
Fact 2: Besides the above-named species, various other species of the genus have been used medicinally.

Output: Macroevolution is evolution over geologic time at the genus level and above.


Input: Consider Input: Fact 1: harming an animal species has a negative impact on the population size of that species. 
Fact 2: People understand that habitat destruction and pollution are harmful to wildlife.


Output: pollution has a negative impact on the population size of a species.