Burning, defined in chemical terms as the rapid combination of a substance with oxygen, accompanied by the evolution of heat and usually light. A slow-burning candle flame and the explosion of a mixture of petrol vapour and air are extreme examples of combustion. Combustion is an exothermic reaction as heat energy is given out.
White, blue, and red became known as the pan-Slavic colours, influencing many other Eastern European flags. White, blue, and red are also the colours of the arms of the Duchy of Moscow. Effective date: 11 December 1993.