In addition, personal car ownership is expected to increase rapidly in many countries in the coming decades. As ownership rates in emerging economies and developing countries start to approach levels in OECD countries, a business-as-usual scenario would see them encounter significant increases in import fuel costs and environmental impacts. Key solutions include public transit (such as light rail and bus rapid transit) and non-motorised transport (especially in regions that are unlikely to experience high car ownership levels), improved vehicle fuel economy, adoption of electric and plug-in hybrid electric vehicles (EV/PFIEVs), and wider use of biofuels.