Agroforestry systems may show low CO2 efflux. and CO2 efflux contributes to sustainability. This work aimed to evaluate the soil CO2 efflux in coffee plantations cultivated in agroforestry and full-sun systems during the winter in high-altitude tropical climate regions. The work was carried out at three family farms (RO. https://mysocialfeeder.com/story4381061/an-inexact-multiple-recourse-hybrid-fuel-management-model-with-considering-carbon-reduction-requirement-for-a-biofuel-penetrated-heating-system