The natural environment, usually referred to just as the environment, is a terminology that comprises all living and non-living things that occur naturally on Earth or some region thereof. Whole ecological units that function as natural systems without huge human intervention, including all vegetation, animals, microorganisms, rocks, ambiance and natural phenomena that occur within their boundaries. It is the common understanding of natural environment that underlies environmentalism a wide political, social, and philosophical movement that advocates a variety of actions and policies in the interest of protecting what nature remains in the natural environment, or restoring or increasing the role of nature in this environment. While true wilderness is gradually rarer, wild nature can be found in many locations previously occupied by humans. Goals commonly expressed by environmental scientists include:
- Reduction and clean up of pollution, with future goals of zero pollution;
- Cleanly converting nonrecyclable materials into energy through direct combustion or after conversion into secondary fuels;
- Reducing societal consumption of non-renewable fuels;
- Development of alternative, green, low-carbon or renewable energy sources;
- Conservation and sustainable use of scarce resources such as water, land, and air;
- Protection of representative or unique or pristine ecosystems;
- Preservation of threatened and endangered species extinction;
- The establishment of nature and biosphere reserves under various types of guard; and, most usually, the protection of biodiversity and ecosystems upon which all human and other life on earth depends.
Very big development projects also called mega projects pose special challenges and risks to the natural environment. Main dams and power plants are cases in point and the challenge to the environment from such projects is rising because more and bigger mega projects are being built, in developed and developing nations alike. Recently, there has been a strong concern about climate change such as global warming caused by anthropogenic releases of greenhouse gases, most notably carbon dioxide, and their connections with humans and the natural environment. Efforts here have alert on the mitigation of hothouse gases that are causing climatic changes, and on developing adaptative strategies to assist species, ecosystems, humans, regions and nations in adjusting to the Effects of global warming.
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