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Earth is the only known place that has ever been habitable for life. Earth's life developed in Earth's early bodies of water some hundred million years after Earth formed. Earth's life has been shaping and inhabiting many particular ecosystems on Earth and has eventually expanded globally forming an overarching biosphere. [241]
Understanding planetary habitability is partly an extrapolation of the conditions on Earth, as this is the only planet known to support life.. Planetary habitability is the measure of a planet's or a natural satellite's potential to develop and maintain an environment hospitable to life. [1]
In 1996, Wackernagel and Rees published the book Our Ecological Footprint: Reducing Human Impact on the Earth. [ 15 ] The simplest way to define an ecological footprint is the amount of environmental resources necessary to produce the goods and services that support an individual's lifestyle, a nation's prosperity, or the economic activity of ...
The Earth's life-support systems are facing greater risks and uncertainties than ever before, with most major safety limits already crossed as a result of planet-wide human interventions ...
Earth's climate system is a complex system with five interacting components: the atmosphere (air), the hydrosphere (water), the cryosphere (ice and permafrost), the lithosphere (earth's upper rocky layer) and the biosphere (living things). [28]: 1451 Climate is the statistical characterization of the climate system.
The term is most often applied to Earth or some parts of Earth. This environment encompasses the interaction of all living species, climate, weather and natural resources that affect human survival and economic activity. [1] The concept of the natural environment can be distinguished as components:
The diversity of life on Earth is a result of the dynamic interplay between genetic opportunity, metabolic capability, environmental challenges, [90] and symbiosis. [91] [92] [93] For most of its existence, Earth's habitable environment has been dominated by microorganisms and subjected to their metabolism
Celebrate Earth Day 2024 with these inspiring sayings about honoring nature and the environment. Share famous quotes from world leaders, activists and writers.
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