China’s wind industry is considering legal action against government ministries in three Chinese provinces in an attempt to force the country to use more wind energy, as systemic problems hinder Beijing’s commitment to cut fossil fuel use.

China has emerged as the world’s top region for wind power, accounting for a third of global installed capacity after overtaking the EU last year, according to the Global Wind Energy Council. But much of the electricity produced by its vast wind farms goes unused, with grids unable to accommodate fluctuating sources of power and amid rising overcapacity in the country’s total power generation.

China’s Wind Association said on Thursday it had given relevant ministries in the provinces of Gansu, Yunnan and Xinjiang two weeks to justify explicit curbs on wind power use by local grids, and may pursue litigation depending on the response.