Adolescence /ˌæd

carbon emissions plural noun
carbon dioxide that planes, cars, factories, etc. produce, which is harmful to the environment
We all need to do more to reduce carbon emissions.
exhaust /ɪgˈzɔːst/ /-ˈzɑːst/ noun [ U ]
the waste gas from an engine, especially a car's, or the pipe the gas flows through
Car exhaust is the main reason for the city's pollution.
See picture car exterior
fossil fuel noun [ C or U ]
fuels such as gas, coal and oil, which were formed underground from plant and animal remains millions of years ago
fuel /fjʊəl/ noun
1. [ C or U ] a substance which is used to provide heat or power, usually by being burned
Wood, coal, oil, petrol and gas are all different kinds of fuel.
Plutonium is a fuel used to produce nuclear energy.