Energy generated from sources which are either inexhaustible or have naturally renewable capacity is called renewable or sustainable energy. Wind, solar, biomass, hydropower, etc. are the major sources of renewable energy. Hereon, we will be in the age of green energy. So, proper understanding renewable energy is really important.
Green energy vs clean energy
Clean energy and green energy are often used interchangeably. Actually, green energy is energy that is sourced by naturally replenishing resource; whereas, clean energy denotes energy without pollution or greenhouse gases emission.
For example, nuclear energy could be an example of clean energy but can’t be green energy. But, energy qualified to be green energy can be automatically clean energy.
Precisely, energy sourced by sun, wind, water, geothermal, biomass are known as green, as well as clean energy.
Renewable energy Vs sustainable energy
Sources of sustainable energy can’t be exhaustive and everlasting; while sources of renewable energy are naturally replenishing. Here, sources of renewable energy can’t be everlasting due to duration needed for replenishing cycle.
Sustainable energy example are solar and wind. Because, They are not going to exhaust in near future at any cost. But, it is also worth noting that there are many challenges to make them usable commercially.
These differentiations among renewable, sustainable, green, and clean are inevitable to make the picture more vivid. This is going to make crystal clear how conventional energy is different from others. Definitely, these will help in proper understanding renewable energy in the present context.
Sources of renewable energy
No dearth of sources of renewable energy on the earth but there is no easy way to harness to meet the ever soaring energy demands worldwide.
- Biomass
- Hydropower
- Geothermal
- Wind
- Solar
Wind, solar, and hydropower have better hope to be at the centre stage in the age of green and clean energy. But, unless we invent better technology to make it commercially viable, they would remain as peper tigers. Present technology isn’t capable to do this.
Secondly, biomass, tidal, and geothermal have limited scope in terms of both resource availablity and available technology. In poor or technologically backward nations, the aim to go green seems totally hypothetical.
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