Audi is considering investments in clean energy for sites in China, where the luxury car-maker is struggling to source enough power from renewable sources to churn out hundreds of thousands of vehicles each year.

Volkswagen AG¡¯s key earnings contributor has pledged to make its production network carbon-neutral by 2025, and has already moved plants in Belgium and Hungary onto a net-zero footprint. The task is more complex elsewhere, and particularly in China where fossil fuels remain a dominant source of power supply.

¡°China is the most difficult market to precisely forecast the tipping point toward electric vehicles, partly because of the availability of green energy sources in some regions,¡± chief financial officer Juergen Rittersberger said in an interview. Audi may move to ¡°investing in green energy ourselves at some locations.¡±