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: recycling has a positive impact on the environment. 
Fact 2: Steel is a recycled and recyclable product.
Example Output: certain Steel products have a positive impact on the environment.

Example Input: Fact 1: the emission of sulfur dioxide causes acid rain. 
Fact 2: ACID RAIN Acid rain is polluted and harmful to the environment.
Example Output: Sulfur dioxide emissions cause pollution and harm to the environment.

Example Input: Fact 1: Monotremes are mammals that reproduce by laying eggs. 
Fact 2: Examples of monotremes are the Platypus and Echidna.
Example Output:
Echidnas reproduce by laying eggs.