Why all countries to encourage the development of photovoltaic solar generator?

Why more and more countries and businessmen crucial and investment photovoltaic solar energy generator? It can improve our present production environment pollution for us? And why is it more urgent?

Coal, oil, gas, water and nuclear energy is the source of these survival and development of human society, but according to statistics 45 years after the oil will be depleted natural gas would only last until around 2075, even up to the largest coal resources only mined 220 years. The most serious problem is that we are now seriously polluted ecological environment is the burning of coal, oil and other fossil fuels. there are several hundred thousand tons per year of harmful substances such as sulfur dioxide and other greenhouse gas emissions and make the earth produce significant greenhouse efficiency, causing global climate change, now appear all over the haze seriously affect our health.

Some may say that nuclear energy is clean, but can event of a nuclear leak, the consequences are equally serious, and the processing of nuclear waste has not yet been a reasonable solution.

In all of the new energy to the growing demands for new energy when solar energy storage stand out, more and more people's attention with clean,non-polluting and inexhaustible etc. advantage. 

Earth's surface each year accept the sun's radiation is often considerable 5.4 * 1024J, this data is equivalent to 1800 tons of standard coal, for 5% conversion rate into electrical energy, 40 times the annual generating capacity of 5600 watts per hour, worldwide energy consumption . therefore, solar power will become our dominant energy source. According to statistics, in 2100 solar energy will reach 68% share in the total energy mix. so solar backup power is very huge.

In addition to the use of photovoltaic power solar off grid system using renewable resources, but also has a wide distribution of resources, so easy to solve some areas restricted water resources problems, only local solar irradiation can be used. In addition photovoltaic and electricity in the same area large degree of convergence save remote transmission and distribution equipment costs.

Thus solar generator will have a huge significance for our future lives and our energy development, environmental protection plays a vital impact also.