An air traffic controller monitoring radar signals determines than an aircraft is flying at the wrong altitude. She communicates with the airplanes pilot via radio to alert them about this. Which two kinds of waves was the air traffic controller using, and what kinds of waves are they?

The human activities in two locations are described below: location a: rampant use of plastic containers location b: excessive use of pesticides and fertilizers which statement is most likely true? location a will have poor air quality because plastic is biodegradable. location a will experience water scarcity because plastic absorbs moisture. the population of honeybees will increase in location b because production of crops will increase. the population of fish in location b will decrease because the water is contaminated.