1. Most Abundant Energy form
The energy from the Sun is the most abundant form of energy available. In one hour, enough sunlight falls on the earth to produce energy for the entire year for the world. 173,000 terawatts of solar energy strikes the Earth continuously. That's more than 10,000 times the world's total energy use. Compare this with other forms of energy (see figure below) and it clear that Solar is the ultimate solution. We are harnessing less than 0.0001% of what is available to us! Can we possibly meet 50% of our energy needs by 2050 using only solar energy?
The Sun is the star of our solar system and its suppose to meet the energy needs of all planets. There is a reason why it is called 'renewable' or 'sustainable' energy and it is the fact that the Sun's energy is there to stay and it's not diminishing like the reserves of fossil fuel. Fossil fuels (coal, oil and natural gas) are non-renewable, that is, they draw on finite resources that will eventually dwindle, becoming too expensive or too environmentally damaging to retrieve. The sun's heat also drives the winds, whose energy, is captured with wind turbines. Then, the winds and the sun's heat cause water to evaporate. When this water vapour turns into rain or snow and flows downhill into rivers or streams, its energy can be captured using hydroelectric power. Along with the rain and snow, sunlight causes plants to grow. The organic matter that makes up those plants is known as biomass. Biomass can be used to produce electricity, transportation fuels, or chemicals. The use of biomass for any of these purposes is called bioenergy. Sun is source of infinite energy for our planet.
3. Zero Emissions
Production of electricity or heat from Solar energy does not lead to harmful emissions to the environment such as toxins or green-house gases that lead to global warming and other ill-effects. In fact there are almost Zero emissions during the use of Solar energy for meeting our energy needs. There is also no consumption of precious water. There are now even aircrafts and ships moving around the world on solar power that are causing absolutely no emissions when they move around.
4. No Noise Pollution
There is no noise pollution when producing energy from the Sun (Solar PV or Solar thermal technologies). In fact there is no noise at all. No other form of renewable or non-renewable energy options can do this!
5. Safe and Healthy
Production and use of Solar energy poses very little process hazards. Risks of explosion, fire and chemicals are almost non-existent. Solar energy is hence the safest and healthiest ways to produce energy. See how even very large solar power plants operate safely and quietly.