How do firefighters tackle different kinds of fire?

In the UK a fire engine is able to produce foam and water for firefighting, so water for a building fire, and foam for a car fire were there are flammable liquids. In a building fire, a firefighter would tackle each corner of the room to fight back any flammable gasses that are in the over pressure. once them gasses are pushed back the firefighter can then start tackling the source of the fire