what is the means Boiler ?
It's a statistical tool for comparing the data from sets of totally unrelated data and using them to prove whatever conclusions one desires either for or against global climate change.
The heat of combustion of coal in the boiler is utilised to convert water into steam at high temperature and pressure. The flue gases from the boiler make their journey through super heater, economiser, air pre-heater and are finally exhausted to atmosphere through the chimney