While the power sector emission intensity is close to reaching zero emissions, the transport sector is still heavily reliant on fossil fuels and accounted for 36% of Costa Rica’s 2015 emissions. Agriculture is the second highest emitting sector, accounting for another 35% of Costa Rica’s emissions. Due to its high proportion of forest cover, the LULUCF sector represents a large sink for Costa Rica, absorbing around 13% of 2015 emissions with a sink of 2.2 MtCO₂e/yr. Waste is the third highest emitting sector in the country, with most of the emissions in this sector due to anaerobic decomposition of organic waste in landfills, which produces high levels of methane, and low levels of recycling of other materials.,
As electrification of the power sector increases to a target of 100% by 2030, the transport sector will continue to be the highest emitting sector through 2030 and beyond, and therefore represents the greatest opportunity for emissions reductions. Agriculture is another sector projected to continue increasing emissions unless rapid mitigation can be achieved.