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Book 8: Chapter 10 – Environmental Terms


  1. Pyrolysis is a thermochemical decomposition of organic material at elevated temperatures without the participation of oxygen. The word is coined from the Greek-derived elements pyr "fire" and lysis "separating". The process is used heavily in the chemical industry, for example, to produce charcoal.

  2. Slurry is a thick suspension of solids in a liquid form. One of the examples of slurries includes a mixture of animal waste and water used as fertiliser.

  3. Organic farming is the form of agriculture that relies on techniques such as crop rotation, green manure, compost and biological pest control. Organic farming uses fertilisers and pesticides but excludes or strictly limits the use of manufactured (synthetic) fertilisers, pesticides, etc.

  4. Incineration is a waste treatment process that involves the combustion of organic substances contained in waste materials. Incineration of waste materials converts the waste into ash, flue gas and heat.

  5. A green belt or greenbelt is a policy and land use designation used in land use planning to retain areas of largely undeveloped, wild, or agricultural land surrounding or neighbouring urban areas.

  6. Forestry is a science and art of cultivating, maintaining and developing forests. The main goal of forestry is to create and implement systems that allow forests to continue a sustainable provision of environmental supplies and services.

  7. Desertification is the degradation of land in any dry lands. It is caused by a variety of factors, such as climate change and human activities, desertification is one of the most significant global environmental problems.

  8. Conservation is an ethic of resource use, allocation and protection. Its primary focus is upon maintaining the health of the natural world its, fisheries, habitats, and biological diversity. Secondary focus is on materials conservation and energy conservation, which are very important to protect the natural world.

  9. Biofuel is a type of fuel whose energy is derived from biological carbon fixation. Biofuels are gaining increased public and scientific attention, driven by factors such as oil price hikes, the need for increased energy security, concern over greenhouse gas emissions from fossil fuels, and support from government subsidies.

  10. An artesian aquifer is a confined aquifer containing groundwater under positive pressure. This type of well is called an artesian well. Water may even reach the ground surface if the natural pressure is high enough, in which case the well is called a flowing artesian well.  

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