TASK DEFINITION: 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.
PROBLEM: Fact 1: Loss of ozone has created an ozone hole over Antarctica. 
Fact 2: ClO is the reactive form of chlorine that triggers ozone loss.

SOLUTION: ClO triggers ozone holes.

PROBLEM: Fact 1: satellites are used to take images from space. 
Fact 2: Images of Earth taken from space.

SOLUTION: satellites are used to take images of Earth.

PROBLEM: Fact 1: if the amount of available food and water decreases in an environment then animals may leave that environment to find food and water. 
Fact 2: Food and water provided to patients by mouth is the usual means of providing nutrition to patients.

SOLUTION:
If the nutrients available in an environment decreases, then animals may leave to find them.