carbon emissions
noun [ plural ] uk/ˈkɑː.bən iˌmɪʃ.ənz/ us/ˈkɑːr.bən iˌmɪʃ.ənz/
碳排放（飞机、汽车、工厂等排放出的有害环境的二氧化碳气体）
carbon dioxide that planes, cars, factories, etc. produce, thought to be harmful to the environment
We all need to do more to reduce carbon emissions. 我们都要在减少碳排放上下更大力气。