LONDON (Reuters) – Electric vehicles and more efficient fuel technology will cut transportation demand for oil by 2040 more than previously expected, but the world may still face a supply crunch without enough investment in new production, the International Energy Agency (IEA) said on Tuesday.

Oil demand is not expected to peak before 2040, the Paris-based IEA said in its 2018 World Energy Outlook.

The IEA’s central scenario is for demand to grow by around 1 million barrels per day (bpd) on average every year to 2025, before settling at a steadier rate of 250,000 bpd to 2040 when it will peak at 106.3 million bpd.

“In the New Policies Scenario, demand in 2040 has been revised up by more than 1 million bpd compared with last year’s outlook largely because of faster near-term growth and changes to fuel efficiency policies in the United States,” the agency said.

The IEA believes there will be around 300 million electric vehicles on the road by 2040, no change on its estimate a year ago. But it now expects those vehicles will cut demand by 3.3 million bpd, up from a previous estimated loss of 2.5 million bpd in its last World Energy Outlook.

Read more: Reuters