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  2. Sustainability and environmental management - Wikipedia

    en.wikipedia.org/wiki/Sustainability_and...

    Water covers 71% of the Earth's surface. Of this, 97.5% is the salty water of the oceans and only 2.5% freshwater, most of which is locked up in the Antarctic ice sheet. The remaining freshwater is found in lakes, rivers, wetlands, the soil, aquifers and atmosphere.

  3. Ecosphere (planetary) - Wikipedia

    en.wikipedia.org/wiki/Ecosphere_(planetary)

    In this global ecosystem, the various forms of energy and matter that constitute a given planet interact on a continual basis. The forces of the four Fundamental interactions cause the various forms of matter to settle into identifiable layers. These layers are referred to as component spheres with the type and extent of each component sphere ...

  4. Biological organisation - Wikipedia

    en.wikipedia.org/wiki/Biological_organisation

    Communities interacting not only with each other but also with the physical environment encompass an ecosystem, such as the Savanna ecosystem. All of the ecosystems make up the biosphere, the area of life on Earth. The simple standard biological organisation scheme, from the lowest level to the highest level, is as follows: [1]

  5. Human impact on the environment - Wikipedia

    en.wikipedia.org/wiki/Human_impact_on_the...

    It can be measured by the ecological footprint, a resource accounting approach which compares human demand on ecosystems with the amount of planet matter ecosystems can renew. Estimates by the Global Footprint Network indicate that humanity's current demand is 70% [27] higher than the regeneration rate of all of the planet's ecosystems combined ...

  6. Earth system science - Wikipedia

    en.wikipedia.org/wiki/Earth_system_science

    2 in an ecosystem. As systems biology , systems ecology seeks a holistic view of the interactions and transactions within and between biological and ecological systems. Earth system science ( ESS ) is the application of systems science to the Earth .

  7. Ecological pyramid - Wikipedia

    en.wikipedia.org/wiki/Ecological_pyramid

    The pyramid of energy represents how much energy, initially from the sun, is retained or stored in the form of new biomass at each trophic level in an ecosystem. Typically, about 10% of the energy is transferred from one trophic level to the next, thus preventing a large number of trophic levels.

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