Clean Tech China Cleantech Investment Trend Government investment and total investment in environmental prevention (including renewable energy) By 2016, China's green investment had reached RMB 1.85 trillion (approx. USD 269 billion), which constitutes 2.5% of the GDP. It is estimated that the cleantech sector will reach RMB 17 trillion (approx. USD 2.47 trillion) by 2020, with an increase of RMB 2 trillion (approx. USD 290 billion) each year.