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.

Question: Wendy decreases the frequency of her radio's sound waves. These waves now have _____ energy. 
 Answer: less
Higher frequency waves have greater energy.

Question: If we are able to recycle less things we have 
 Answer: more waste
The advantage to biofuels is that they burn more cleanly than fossil fuels. As a result, they create less pollution and less carbon dioxide.

Question: The farther from sea level that you get the 
 Answer: cooler it is

The surface is heated by the Sun and some of that heat radiates back into the air. This makes the temperature higher near the surface than at higher altitudes.