5. What environmental problem does hydroelectric power create?

3. Microwave ovens are cheap … they use less electricity than electric ovens.

Fill in the blanks using “and” or “, but”. (Điền vào chỗ trống sử dụng “and hoặc “, but”.)

1. Electric cars are clean , but they are expensive to buy.

2. Nuclear power can sometimes be dangerous … it's cheap to run.

Write sentences using the prompts. (Viết lại câu sử dụng gợi ý.)

1. Coal/ cheap/ easy/ use

Match the words with the pictures. (Nối từ với bức tranh tương ứng.)

4. Solar panels save money … they are clean.

In pairs: Make sentences about different types of transportation. Use the prompts. (Theo cặp: Viết câu về các loại phương tiện khác nhau sử dụng gợi ý.)