Tick (✔) what saves energy and cross (X) what doesn't save energy.

Tick (✔) what saves energy and cross (X) what doesn't save energy.

• a driving a car X
• b having a solar panel on the roof ✔
• c leaving the TV on when you aren't watching X
• d not leaving a computer on stand-by ✔
• e riding a bike to school ✔
• f using coal to heat the house X
• g wearing T-shirts at home in winter with the heating very high X