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Why is the color green callled green?

Which control would most likely achieve the greatest reduction of noise pollution? limiting airplane traffic insulating buildings and homes reducing road and highway traffic using headphones to listen to music building noise barriers beside highways

Which of the following activities would conserve the most energy? installing a dimmer switch on a light using a blender instead of a food processor hanging clothes to dry on a clothesline instead of ironing them opening a window instead of turning on the air conditioning setting your computer's screen saver to turn on after less time has elapsed