Adolescence /ˌæd

nuclear fuel
unleaded fuel
The new exhaust system, it is claimed, will lower fuel consumption .
2. [ U ] anything that keeps people's ideas or feelings active, or makes them stronger
Reports in today's newspapers have added fuel to the controversy (= made it worse) .
fumes /fjuːmz/ plural noun
strong, unpleasant and sometimes dangerous gas or smoke
exhaust fumes
Petrol fumes always make me feel ill.
cigar fumes
gas /gæs/ noun plural gases or gasses AIR SUBSTANCE
1. [ C or U ] a substance in a form like air that is neither solid nor liquid
Oxygen, hydrogen and nitrogen are all gases.
2. [ C or U ] a substance in a form like air that is used as a fuel for heating and cooking
Do you prefer cooking with electricity or gas?
UK A leak in the gas mains (= pipes) caused a major explosion.
poisonous/inflammable/toxic gas a gas -fired power station
3. [ U ] informal a substance in a form like air used for medical purposes to prevent people feeling pain or being conscious during an operation
I had/was given gas when I got my wisdom teeth out.
4. [ U ] mainly US for wind (BOWELS) Beer gives me gas.