source of energy
能量资源
Solar energy is one of the cleanest and most plentiful sources of energy.
太阳能是最干净和最丰富的能量之一
Solar power depends on sunlight, so in cloudy weather and at night, no power is generated.太阳能依靠太阳光，所以在阴天或者晚上，是没有能量产生的
Wind energy is non-polluting but is only useful in places where there is a lot of wind.风能是没有污染（环保的）的，但是要在有（很多）大风的地方才有用
Wind turbines convert the kinetic energy of the wind into mechanical power.风力涡轮机将风转化为机械能量
Nuclear energy is efficient and doesn’t produce carbon gases as a waste product.核能是有效的不会产生作为废物的二氧化碳
The dangers of nuclear power include deadly radioactive waste products.危险的很能包括致命的放射性废物
A major source of energy comes from the burning of fossil fuels, such as coal and oil.一个主要的能量来源于燃烧化石燃料，比如 煤和石油
When we burn fossil fuels, waste gases such as CO2 are produced. 当我们燃烧化石燃料，废物气体就会产生二氧化碳等
Fossil fuels remain the largest source of energy for most countries. 化石燃料的残留是这些国家最大的能量
Hydropower comes from the kinetic energy of falling water.水利发电来自是瀑布动能
Output is reliable and can be regulated to meet the demand, except during periods of drought.输出可靠，可以调节满足需求，除非在干旱时期
Dams are expensive to build and affect wildlife such as fish.水坝造价昂贵，会影响鱼类等野生动物。
We need to reduce the use of fossil fuels to produce energy.我们需要减少使用化石燃料来生产能源。
