| Product 5 |
| 【 Font Size：L M s 】【PRINT】 DATE：2019/8/1 Page view:217 |
Advantage
(1) widespread: the sun shines on the earth, there is no geographical restrictions, either on land or sea, regardless of mountains or islands, are everywhere, can be directly developed and utilized, easy to collect, and no need to mine and transport.
(2) harmless: development and utilization of solar energy will not pollute the environment, it is one of the most clean energy, in today's environmental pollution is more and more serious, this is extremely valuable.
(3) huge: the solar radiation that reaches the earth's surface every year is about 130 trillion tons of coal, the total amount of energy that is now the world's largest.
(4) for a long time: according to estimates produced by the sun energy rate, amount of hydrogen storage sufficient to maintain the billions of years, and the life of the earth is about billions of years, in this sense, we can say the sun's energy is inexhaustible.
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