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.

Fact 1: using a car causes pollution. 
Fact 2: Toyota car is truly the car for the present and the future.
Toyota causes pollution.

Fact 1: acid rain has a negative impact on water quality. 
Fact 2: Acid rain is harmful rain.
some rain is harmful.

Fact 1: insulated material can be used for keeping warm. 
Fact 2: Guard hairs protect the fur, while the fur insulates the mammal.

fur can be used for keeping warm.