ADJ

noxious, poisonous, toxic
explosive, inflammable, radioactive
inert
exhaust, greenhouse
pollution from greenhouse gases
nerve, tear
Police used water cannon and tear gas against demonstrators

VERB + GAS

give off, produce
It gives off a poisonous gas as it rots down

GAS + VERB

build up
Noxious gases had built up in the sewer
escape, leak
Toxic gases can escape through one of the pipes

ADJ

butane, coal, natural, propane
bottled, Calor

VERB + GAS

cook with
I prefer to cook with gas
light, turn on
I lit the gas and put the soup on to warm

GAS + NOUN

appliance, boiler, central heating, cooker, fire, lamp, oven
bottle, cylinder, pipeline
board
industry
field
tapping the North Sea gas fields
supply
works
Local gas works were closed as natural gas became available
leak
All gas leaks should be reported as soon as possible

PHRASES

gas mark 2, 3, etc.
Set the oven at gas mark 4