Clearing is the process of removing bushland, forest, woodland or grassland, and occurs most commonly in Queensland and New South Wales. Over the past 200 years, 70 percent of Australia's native vegetation has been destroyed, most of it in the last 50 years. Around 6 million hectares of various ecosystems were cleared between 2001 and 2004 (http://en.wikipedia.org/wiki/Land_clearing_in_Australia, 2010). Australian land has been exploited over the past century, although it is known as "one of the driest and least fertile continents in the world" (Australian Conservation Foundation, 2000), although land clearance remains a problem in due to increased soil salinity and greenhouse effects. gases. Trees develop into woody plants with a main trunk, many branches, and come in a variety of shapes, leaf types, and reproductive organs. Tree roots can extend up to three meters deep and wide, sometimes damaging buildings or pathways (http://en.wikipedia.org/wiki/Photosynthesis, 2010). All plants photosynthesize, enabling the production of their own food, by converting carbon dioxide and water into glucose and oxygen using solar energy. Therefore, as all organisms release carbon dioxide through respiration, only plants use it to produce oxygen, which is a circular process (http://en.wikipedia.org/wiki/Photosynthesis, 2010). Land clearing has strict laws across Australia, with variation between states (Stone, A. 2010). A common technique for mulching light brush and heavy trees is by chaining, using a heavy chain up to 50 centimeters in diameter. The chain connected between two tractors is kept close to the ground, carefully uprooting the trees along with the roots, flattening the areas. It is required that tractors work at a maximum distance of 30 meters...... middle of paper ......, 'Australian Sera Clearing Methods', FAO Corporate Document Repository, accessed 24 May 2010, • Levine, D. 2010, “Current Population”, World POPClock from the US Bureau of the Census, accessed April 27, 2010, • Nicholas Rothwell, 2000, “A farming we will grow”, Land Conservation, Justin Healey ( ed.), The Spinney Press, New South Wales, page 6. • Philip, M. and William F. 2004, “Tropical Deforestation and Greenhouse-gas Emissions”, Ecological Applications, (no publication information), volume 14, number 4, pp. 982-986, accessed 23 April 2010, • Stone, A. 2010, 'Queensland's inadequate land clearing ban could worsen land clearing rates: WWF', WWF Australia, accessed 10 May. 2010,