Of the five climate sectors, mobility emits the most in the province of Utrecht: 3.16 Mton CO₂-eq per year. The built environment follows at 1.9 Mton.
The weight sits in road traffic exhaust emissions, with passenger transport on the motorways as the largest share. The largest source does not automatically require the largest solutions, but it does explain why electric transport and the electric bicycle were calculated in the Utrecht assessment.