In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.

[EX Q]: Question: Mike removes more and more resistors into his parallel circuit, which causes the total current strength to 
 Answer: decrease
[EX A]: As more resistors are added in parallel, the total current strength increases.

[EX Q]: Question: If Mary is performing an experiment and she increases the frequency of her electromagnetic wave, what happens to the energy it produces? 
 Answer: increases
[EX A]: The higher the frequency of an electromagnetic wave, the greater its energy.

[EX Q]: Question: Chris is studying two countries. He finds that China has half as many factories putting out fossil fuels into the air than the United States. Based on this information, the factories in _____ are causing more air pollution. 
 Answer: United States
[EX A]:
Because richer nations use more fossil fuels, they also cause more air pollution and global warming than poorer nations do.