Which statements show the importance of clean air? Check all that apply. Air is a natural resource. Governments manage air pollution to provide clean air. Lungs naturally purify the air, so air pollution does not harm people. Ultrafine particles contribute to 17,000 deaths per year in the United States. Particles in the air cause health problems.

A1500 w electric heater is plugged into the outlet of a 120 v circuit that has a 20 a circuit breaker. you plug an electric hair dryer into the same outlet. the hair dryer has power settings of 600 w, 900 w , 1200 w, and 1500 w. you start with the hair dryer on the 600 w setting and increase the power setting until the circuit breaker trips. under what setting does the circuit breaker trip.