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  2. Lifeboat ethics - Wikipedia

    en.wikipedia.org/wiki/Lifeboat_Ethics

    In 1974, Hardin published two articles describing his view of "lifeboat ethics" in Psychology Today [2] and BioScience. [3] At the time, based on per-capita gross national product, Hardin asserted that approximately two-thirds of the world's population was "desperately poor" and the remaining one-third was "comparatively rich" before launching his metaphor of each rich country being in a full ...

  3. Carrying capacity - Wikipedia

    en.wikipedia.org/wiki/Carrying_capacity

    Carrying capacity is applied to the maximum population an environment can support in ecology, agriculture and fisheries. The term carrying capacity has been applied to a few different processes in the past before finally being applied to population limits in the 1950s. [1] The notion of carrying capacity for humans is covered by the notion of ...

  4. Overpopulation - Wikipedia

    en.wikipedia.org/wiki/Overpopulation

    Overpopulation or overabundance is a phenomenon in which a species' population becomes larger than the carrying capacity of its environment.This may be caused by increased birth rates, lowered mortality rates, reduced predation or large scale migration, leading to an overabundant species and other animals in the ecosystem competing for food, space, and resources.

  5. Tourism carrying capacity - Wikipedia

    en.wikipedia.org/wiki/Tourism_carrying_capacity

    Tourism carrying capacity (TCC) is an imperfect [1] but useful approach to managing visitors in vulnerable areas. [2] The TCC concept evolved out of the fields of range, habitat and wildlife management. In these fields, managers attempted to determine the largest population of a particular species that could be supported by a habitat over a ...

  6. I = PAT - Wikipedia

    en.wikipedia.org/wiki/I_=_PAT

    I = (PAT) is the mathematical notation of a formula put forward to describe the impact of human activity on the environment. I = P × A × T. The expression equates human impact on the environment to a function of three factors: population (P), affluence (A) and technology (T). [1] It is similar in form to the Kaya identity, which applies ...

  7. Overshoot (population) - Wikipedia

    en.wikipedia.org/wiki/Overshoot_(population)

    Overshoot (population) In environmental science, a population "overshoots" its local carrying capacity — the capacity of the biome to feed and sustain that population — when that population has not only begun to outstrip its food supply in excess of regeneration, but actually shot past that point, setting up a potentially catastrophic crash ...

  8. Sustainability - Wikipedia

    en.wikipedia.org/wiki/Sustainability

    Sustainability is a social goal for people to co-exist on Earth over a long period of time. Definitions of this term are disputed and have varied with literature, context, and time. [2][1] Sustainability usually has three dimensions (or pillars): environmental, economic, and social. [1]

  9. Social norm - Wikipedia

    en.wikipedia.org/wiki/Social_norm

    A social norm is a shared standard of acceptable behavior by a group. [1] Social norms can both be informal understandings that govern the behavior of members of a society, as well as be codified into rules and laws. [2] Social normative influences or social norms, are deemed to be powerful drivers of human behavioural changes and well ...