(you will get brainliest) pollution has become a problem because a. changes in landforms have changed nature's ability to remove pollutants. b. there has been a decrease in the amount of energy available to reduce pollutants. c. man's input of pollutants is greater than the rate nature can remove pollutants. d. over the past 100 years, there has been an increase of natural pollutants. e. changes in the earth's water flow have reduced the rate at which pollutants can be removed.