Nature and Us

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Across
  1. 1. Composting: A method of turning organic wastes into a material that can be used to enrich soil.
  2. 2. Renewable Energy: Energy from a source that is not depleted when used, such as wind or solar power.
  3. 3. Erosion: The process by which natural forces move weathered rock and soil from one place to another.
  4. 4. Invasive Species: Plants, animals, or pathogens that are non-native (or alien) to the ecosystem under consideration and whose introduction causes or is likely to cause harm.
  5. 6. Ecotourism: Tourism directed towards exotic, often threatened, natural environments, intended to support conservation efforts and observe wildlife.
  6. 7. Habitat Destruction: The process by which natural habitat is rendered unable to support the species present. In this process, the organisms that previously used the site are displaced or destroyed, reducing biodiversity.
  7. 9. Endangered Species: Species that are in danger of extinction throughout all or a significant portion of their habitat.
  8. 10. Pollution: The presence or introduction into the environment of a substance that has harmful or poisonous effects.
  9. 11. Carbon Footprint: The total amount of greenhouse gases produced to directly and indirectly support human activities, usually expressed in equivalent tons of carbon dioxide (CO2).
  10. 12. Siltation: The pollution of water by particulate terrestrial clastic material, with a particle size dominated by silt or clay.
Down
  1. 1. Greenhouse Effect: The trapping of the sun's warmth in a planet's lower atmosphere, due to the greater transparency of the atmosphere to visible radiation from the sun than to infrared radiation emitted from the planet's surface.
  2. 2. Eco-friendly: Not harmful to the environment.
  3. 3. Wetlands: Areas of marsh, fen, peatland, or water, whether natural or artificial, permanent or temporary, with water that is static or flowing, fresh, brackish, or salt, including areas of marine water the depth of which at low tide does not exceed six meters.
  4. 4. Biodegradable: Capable of being decomposed by bacteria or other living organisms.
  5. 5. Photosynthesis: The process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product.
  6. 8. Climate Change: A change in global or regional climate patterns, attributed largely to the increased levels of atmospheric carbon dioxide produced by the use of fossil fuels.
  7. 9. Recycling: The process of converting waste materials into new materials and objects.
  8. 10. Deforestation: The action of clearing a wide area of trees.
  9. 11. Reforestation: The natural or intentional restocking of existing forests and woodlands that have been depleted, usually through deforestation.
  10. 12. Aquifer: An underground layer of water-bearing permeable rock, rock fractures or unconsolidated materials (gravel, sand, or silt) from which groundwater can be extracted using a water well.