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: pollutants have a negative impact on the environment. 
Fact 2: Incineration is harmful to the environment, it pollutes.
Example Output: inceneration is harmful to the environment.

Example Input: Fact 1: Most organisms consume--and are consumed by--more than one species. 
Fact 2: Fish Fish are the ultimate aquatic organism.
Example Output: most fish consume more than one species.

Example Input: Fact 1: if an object in a fluid is more dense than that fluid then that object will sink in that fluid because of gravity. 
Fact 2: An object is buoyant when it is less dense than the fluid around it.
Example Output:
Decreasing the density of something increases its buoyancy.