Two little blobs of paint – a yellow one and a blue one – met each other on a canvas. And they plunged into a face-to-face argument which one of them is more beautiful and useful. “Sure, I’m the most important one, - the Yellow Blob said – No one can paint the sun without me”. “No, I am more important. The painter couldn’t paint a sea, an ocean or the sky without me” – the Blue Blob answered. Their controversy was becoming more and more heated till they clashed. The blobs merged with each other. And suddenly they could not recognize themselves. They became very alike. Both of them turned to green. And only at that very moment they understood that each of them plays its special role, each of paints has its own destination. Green is the colour of freshness, the colour of the forest, trees and the colour of life on Earth. And each of us can take a step forth to preserve this colour on our planet.