Non-living variable within the ecosystem, affecting the life of organisms. Examples include temperature, light, and water. Abiotic factors can be harmful to the environment, as when sulphur dioxide emissions from power stations produce acid rain.
Red, white, and blue recall the French tricolour. Red, yellow, and green are the pan-African colours. Red represents the common blood of mankind which links African and European nations. Effective date: 1 December 1958.