The world is going green at an unprecedented rate.
According to a report by the international energy agency (IEA), 2016's renewable energy accounts for two-thirds of the new electricity generated by the global grid and more solar power than any other technology.
Overall, renewable energy is expected to grow twice as much in the next five years as natural gas and coal.
It is reported that the new solar energy has even exceeded the net growth of coal, the largest source of electricity generation.
In many countries, solar power is driven by falling prices and more favourable government policies.
Now, the agency, funded by the 28 governments, predicts that global solar capacity will be greater than India and Japan combined in five years.
Dr Fatih Birol, executive director of the international energy agency, said: "we are witnessing the birth of a new era of solar pv [photovoltaic].
We expect solar pv to grow faster than other renewable energy technologies to reach 2022."
The agency says it underestimates solar growth.
Based on data from 2016, the IEA expects China and India to have a third of solar 2022.
China, the world's most polluted country, is notorious for its expansion of renewable energy.
The us is the second growing market, despite President trump's insistence on opposition to climate change.
India is a "solar heat" for the next five years.
Solar-powered farms that generate electricity from solar grids are already common, and the country's innovation is to ensure that even the poorest residents can get green inventions.
Because India's renewable energy capacity will double, it is likely to overtake the eu's growth by 2022.
In solar power, Britain is expected to lag behind.
The solar forecast for 2022 is a fifth of the amount installed in the last five years.
Offshore wind farms are expected to account for most of Britain's renewable energy growth.
The world's acceptance of clean energy means that technology, including wind, solar and geothermal energy, is competing with fossil fuel prices.
Paolo Frankl, head of renewable energy, said at the international energy agency that "renewable energy is likely to be a cheaper alternative to fossil fuels [in the next five years]."
Coal is still the biggest source of electricity within five years.
But renewables' share of electricity will rise from 24% in 2016 to 30% in 2022.