At present, the most heavily supported sector is renewable energy, but in future sectors such as automobile manufacturing are destined to become a target for support. The IEA estimates for investment in the transport sector are dominated by investment in electric vehicles and associated infrastructure, and heavily weighted to a post-2035 period when those technologies are predicted to become part of the mainstream. From an environmental perspective, subsidies in this sector are probable, and already exist in many countries, the internal combustion engine will have to be replaced if the Agreement targets are to be met.