b. Make sentences to say which of the renewable sources are :
- the most expensive, the noisiest, the cleanest ,the safest , the most polluting ,
- the most water-consuming and the most available.
- Justify your choice of the superlative for each source of energy.
Examples:
1. Biomass is found in urban dumps and on farms. Of the six renewable energy sources it is the most polluting because it pollutes the air.
2. Solar energy is found in sunny areas. Of the six renewable energy sources it is the quietest as solar panels do not move.
Now complete the following:
3. Tidal wave energy…………………. Of the six renewable energy sources it is……………because of its……………
Tidal wave energy is found in bays and on beaches. Of the six renewable energy sources it is the most available because of its enormous energy potential.
4. Wind energy…………… Of the six renewable energy sources it is……….because of …………
Wind energy is found on coasts and in the moutains. Of the six renewable energy sources it is the noisiest because of its turbines.
Hydroelectric energy …………… . Of the six renewable energy sources it is……………… and…………………but it is ……….since………………
Hydroelectric energy is found in the mountains and rivers. Of the six renewable energy sources it is the safest and the cleanest but it is the most expensive since it needs a lot of investments.
4. Geothermal ……………… Of the six renewable energy sources it is……….since…………
Geothermal is found in places of water. Of the six renewable energy sources it is the most water consuming since it consumes a lot of water.