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  2. Environmental impact of concrete - Wikipedia

    en.wikipedia.org/wiki/Environmental_impact_of...

    Environmental impact of concrete. The environmental impact of concrete, its manufacture, and its applications, are complex, driven in part by direct impacts of construction and infrastructure, as well as by CO 2 emissions; between 4-8% of total global CO 2 emissions come from concrete. [ 1 ] Many depend on circumstances.

  3. Cementation (geology) - Wikipedia

    en.wikipedia.org/wiki/Cementation_(geology)

    Cementation (geology) A brief, easy-to-understand description of cementation is that minerals bond grains of sediment together by growing around them. This process is called cementation and is a part of the rock cycle. Cementation involves ions carried in groundwater chemically precipitating to form new crystalline material between sedimentary ...

  4. Concrete degradation - Wikipedia

    en.wikipedia.org/wiki/Concrete_degradation

    Carbonation of concrete is a slow and continuous process of atmospheric CO 2 diffusing from the outer surface of concrete exposed to air into its mass and chemically reacting with the mineral phases of the hydrated cement paste. Carbonation slows down with increasing diffusion depth.

  5. Limestone - Wikipedia

    en.wikipedia.org/wiki/Limestone

    Limestone (calcium carbonate CaCO3) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of CaCO3. Limestone forms when these minerals precipitate out of water containing dissolved calcium.

  6. Deforestation and climate change - Wikipedia

    en.wikipedia.org/wiki/Deforestation_and_climate...

    Deforestation is a primary contributor to climate change, [ 1 ][ 2 ] and climate change affects the health of forests. [ 3 ] Land use change, especially in the form of deforestation, is the second largest source of carbon dioxide emissions from human activities, after the burning of fossil fuels. [ 4 ][ 5 ] Greenhouse gases are emitted from ...

  7. Five themes of geography - Wikipedia

    en.wikipedia.org/wiki/Five_themes_of_geography

    Five themes of geography. Location. Place. Human-Environment Interaction. Movement. Region. The five themes of geography are an educational tool for teaching geography. The five themes were published in 1984 [1] and widely adopted by teachers, textbook publishers, and curriculum designers in the United States. [2]

  8. Built environment - Wikipedia

    en.wikipedia.org/wiki/Built_environment

    The built environment is made up of physical features. However, when studied, the built environment often highlights the connection between physical space and social consequences. [4] It impacts the environment [8] and how society physically maneuvers and functions, as well as less tangible aspects of society such as socioeconomic inequity and ...

  9. Natural environment - Wikipedia

    en.wikipedia.org/wiki/Natural_environment

    The term is most often applied to Earthor 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 environmentcan be distinguished as components:

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