on batteries or hydrogen. petrol and diesel cars will become more efficient within this decade and they ll be phased out by 2035. the government also announced that new technology will allow domestic flights to be almost emissions free by 2040, and internationalflights by 2050. but some critics say that s not enough, as our science and environment correspondent victoria gill reports. back on the move. as road traffic reverts to pre pandemic levels, the government s emphasis is on keeping things moving. what s being billed as their greenprint, a plan to reduce carbon emissions across the uk transport sector, promises to do exactly that, without reducing the number of vehicles on the road or planes in the air. the government s already said that sales of new cars and vans powered solely by petrol or diesel will be banned from 2030. in this latest plan, every new lorry is to be zero carbon by 2040 all running on batteries or hydrogen.