今日のレッスン：Energy
1. What happens if we run out of energy?
2. What are biofuels and what harm do they cause the environment?
3. Do you think solar cells, wind farms, tidal power, hydropower and thermal energy will solve our future energy needs?
年末年始のレッスンはお休み。その分、先週は少しタイトだった ^_^; 今週から通常のペース・・
