Unit 5 Стор. 56 - 68: 14

14. 1. I think the most valuable innovation the last 10 years is LED bulb, because it saves a lot of energy and money.

2. Some examples of renewable energy sources are solar energy, wind energy, hydropower, geothermal energy, biomass energy.

3. I use a lot of devices every day, such as: TV, smartphone, laptop, microwave, washing machine etc, and can’t imagine my life without them.