It is freezing in here. Why is the ____ set so high? Half of the average family's energy ____ is used for heating and cooling their home. Farmers use ____ to stop bugs and weeds from killing their crops. ____ food is produced entirely without chemicals. Pollution is the ____ of many environmental problems. When the cost of electricity increases, people are most likely to ____ energy.

Unit 6- Second year . listen and discuss .

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