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: If Mona owns a car and she decides to switch to a cleaner burning fuel, will she create more or less pollution? 
 Answer: less pollution
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: Compared to a ripple in a pond caused by a drop of rain, would a wave in the ocean have 
 Answer: more distantly spaced particles in its rarefactions
Places where particles of a medium crowd closer together are called compressions, and places where the particles spread farther apart are called rarefactions. The more energy the wave has, the closer together the particles are in compressions and the farther apart they are in rarefactions.

Question: John looked at the graphs and noticed something. As the population of people grew smaller, the rate of global warming was 
 Answer: Less

For example, more people on the Earth means more people contributing to global warming and pollution.