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  2. Systems thinking - Wikipedia

    en.wikipedia.org/wiki/Systems_thinking

    Systems thinking is a way of making sense of the complexity of the world by looking at it in terms of wholes and relationships rather than by splitting it down into its parts. [1] [2] It has been used as a way of exploring and developing effective action in complex contexts, [3] enabling systems change. [4] [5] Systems thinking draws on and ...

  3. Earth's orbit - Wikipedia

    en.wikipedia.org/wiki/Earth's_orbit

    Ignoring the influence of other Solar System bodies, Earth's orbit, also known as Earth's revolution, is an ellipse with the Earth-Sun barycenter as one focus with a current eccentricity of 0.0167. Since this value is close to zero, the center of the orbit is relatively close to the center of the Sun (relative to the size of the orbit).

  4. Half-Earth - Wikipedia

    en.wikipedia.org/wiki/Half-Earth

    Half-Earth: Our Planet's Fight for Life is a 2016 book by the biologist E. O. Wilson, the last in a trilogy beginning with The Social Conquest of Earth (2012) and The Meaning of Human Existence (2014). Half-Earth proposes that half of the Earth 's surface should be designated a human-free natural reserve to preserve biodiversity. [1]

  5. Atmosphere of Earth - Wikipedia

    en.wikipedia.org/wiki/Atmosphere_of_Earth

    The stratosphere is the second-lowest layer of Earth's atmosphere. It lies above the troposphere and is separated from it by the tropopause. This layer extends from the top of the troposphere at roughly 12 km (7.5 mi; 39,000 ft) above Earth's surface to the stratopause at an altitude of about 50 to 55 km (31 to 34 mi; 164,000 to 180,000 ft).

  6. Doughnut (economic model) - Wikipedia

    en.wikipedia.org/wiki/Doughnut_(economic_model)

    The Doughnut, or Doughnut economics, is a visual framework for sustainable development – shaped like a doughnut or lifebelt – combining the concept of planetary boundaries with the complementary concept of social boundaries. [1] The name derives from the shape of the diagram, i.e. a disc with a hole in the middle.

  7. Biosphere 2 - Wikipedia

    en.wikipedia.org/wiki/Biosphere_2

    Biosphere 2 is an American Earth system science research facility located in Oracle, Arizona. Its mission is to serve as a center for research, outreach, teaching, and lifelong learning about Earth, its living systems, and its place in the universe. [1] It is a 3.14-acre (1.27-hectare) [2] structure originally built to be an artificial ...

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