Beijing should steer Chinese cities toward clean air by banning the sale of new gas-powered vehicles by 2030, a think tank has said.

The capital could galvanize the rest of China’s megacities by becoming the first to ban the sale of new fossil fuel-run buses, logistics vehicles and taxis in the coming years. It should then ban the sale of new fossil fuel-powered private cars by 2030, the Innovation Center for Energy and Transportation said in a new report.

The report forecasts that gas vehicles’ days are numbered, with sales expected to peak around 2025. Hybrid and pure electric vehicles will take the lead from that point on, with pure electric models likely to make up 85% of the market by 2050. Banning new gas vehicles would speed up the process while helping to clear the capital’s air, the report said.

Read the full analysis later today at caixinglobal.com.