The most significant advantage of using renewable energy sources is that is sustainable (as a result of the fact that is renewable) and the low Greenhouse Gas Emissions.Renewable energy sources do not pollute the environment it with Co2 and other toxic gases that are produced by fossil fuels.
The Sydney opera house is in Australia (:
The answer would be true because the moon has no atmosphere.
Only Earth does and is the only planet.
Hope I answered your question!