12 global warming is the increase of average world

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tsunami which added to the destruction of millions of people’s homes and livelihoods. 12. Global warming is the increase of average world temperatures as a result of what is known as the greenhouse effect. 13. Biodiversity describes the whole range of the different varieties of living things and systems on this earth. 14. Pollution is the introduction of contaminants into the natural environment that cause adverse change. 15. Pollution is caused when harmful or poisonous substances are released or found in the air, rivers, seas, animals, plants or even our bodies. 16. A mirage is a phenomenon where you think you see water. 17. A tsunami is a huge volume of moving seawater. These giant waves can travel for thousands of miles across the sea and still have enough energy and force to destroy buildings, trees, wildlife and people. 18. The word tsunami (pronounced soo-NAH-mee) is Japanese, and it means ‘harbour wave’. 19. Ozone is a naturally occurring gas found in the atmosphere where it absorbs most of the sun's ultraviolet light - invisible rays which are harmful to both plant and animal life. 20. A rainbow is sunlight spread out into an arc of colours and seen by your eyes when the sun shines through water droplets 21. The El Niño effect occurs every two to seven years, and is caused when the strong westward blowing trade winds drop, and warm water moves back eastward across the Pacific Ocean. The Peruvians named the phenomenon ‘El Niño’ – the Christ child, because it tends to begin around Christmas. 22. Rainforests are forests which grow in areas of high rainfall. 23.
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