Advantages and disadvantages of solar energy
(1) Universal: The sun shines all over the earth, without geographical restrictions, whether on land or sea, whether on mountains or islands, there are everywhere, which can be directly developed and utilized, easy to collect, without mining and transportation.
(2) Harmless: the development and utilization of solar energy will not pollute the environment. It is one of the cleanest energy sources. This is extremely valuable in today's increasingly serious environmental pollution.
(3) Huge: The solar radiation energy reaching the earth's surface every year is equivalent to 130 trillion tons of coal, which is the largest energy that can be developed in the world today.
(1) Low efficiency and high cost: The development level of solar energy utilization is feasible in theory and mature in technology. However, due to the low efficiency and high cost of some solar energy utilization devices, the current laboratory utilization efficiency is not more than 30%. In general, the economy cannot compete with conventional energy. In the future, the further development of solar energy utilization is mainly restricted by economy.
(2) Solar panel pollution: At this stage, solar panels have a certain life span. Generally, they need to be replaced every 3-5 years at most. The replaced solar panels are very difficult to be decomposed by nature, resulting in considerable pollution