Switch from dirty to clean energy needs to happen. There is no other way or reasons not to go this direction.
Later on we will share our thoughts on expansion of WePower, please share your thoughts/ideas/needs for any information, we will include it in our plan of publications.
That will not happen so soon, not for next 20-30 years for sure, probably not even then. Only in case of some sudden breakthrough in cold fusion we can talk about totally replacing dirty with clean energy (it will be interesting to monitor ITER development). Fast switch from dirty to clean energy will not happen fast mainly because political and economic factors. Fossil fuels lobbies are too powerful and will allow this shift at the time they are going to be ready to take over lead in green energy not sooner. Another reason is bigger and bigger need for energy, especially in industry. Lets take for example China. It is currently impossible for them to switch to green energy. Their consumption is so big and currently green energy is still too expensive in compare to fossil fuels.
I'm not an expert but, for what I know, I think green energy is not expensive!
Investing in green energy plants is still pretty expensive (because it is still relatively new, but in recent time there is trend of dropping prices in installed power $/MW), and investment repayment time is to a large degree dependable of government subsidies. Acceptable cost of green energy is due to government subsidies. In many countries in Europe there are regulations made by government about percentage of energy that must be made from green sources and is subsidized.
Lets not forget that solar energy is not so clean after all. Technology used to produced solar panels is dirty and it is very affected to environment, but nobody is concerned by that because production was mainly located in China.
Other sources of green energy do not have that big environmental impact but still have some negative impacts on nature (hydro - flooding of land, impact on fish migration... wind - noise pollution, impact on bird fond...) The cleanest green energy is from waves and tidal energy but is still very inefficient.