Why solar energy?
Energy from sun is free and the sun will continue to shine for billions of years to come. While the solar energy is inexhaustible and renewable, its irradiance is environment-friendly. The solar power system does not emit CO2, which is environmentally damaging. In addition, silicon, the raw material in making solar cells, is the second most abundant element in the earth’s crust. Since the solar industry has been developing and the technology is maturing, the PV power systems are efficient for both commercial and residential use. The price of PV systems is also more affordable now due to recent price cuts.
In contrast, fossil fuels, as our main sources of energy, are depleting. Our high dependence on fossil fuels is inevitably going to push up their prices continuously until they are used up. Fossil fuels are nonrenewable and environmentally damaging. Recent climate change is in part a consequence from the increased CO2 concentration in the atmosphere caused by burning fossil fuels.
Therefore, it is essential for us to seek alternative renewable energy resources for guaranteed energy supply and environmental protection. Solar is the answer.