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  2. Nonpoint source pollution - Wikipedia

    en.wikipedia.org/wiki/Nonpoint_source_pollution

    Some may flow directly into water bodies, especially in developing and suburban areas. Also, unlike other types of point sources, such as industrial discharges, sewage treatment plants and other operations, pollution in urban runoff cannot be attributed to one activity or even group of activities. Therefore, because it is not caused by an ...

  3. Three-sector model - Wikipedia

    en.wikipedia.org/wiki/Three-sector_model

    Three sectors according to Fourastié Clark's sector model This figure illustrates the percentages of a country's economy made up by different sector. The figure illustrates that countries with higher levels of socio-economic development tend to have less of their economy made up of primary and secondary sectors and more emphasis in tertiary sectors.

  4. Economic sector - Wikipedia

    en.wikipedia.org/wiki/Economic_sector

    Percentages of a country's economy made up by different sectors. Countries with higher levels of socio-economic development tend to have proportionally less of their economies operating in the primary and secondary sectors and more emphasis on the tertiary sector. The less developed countries exhibit the inverse pattern.

  5. Nonmarket forces - Wikipedia

    en.wikipedia.org/wiki/Nonmarket_forces

    Nonmarket as well as its antecedents "non-economic" and "social" reflects the long search for a term that would encompass what is "not market" after the economic market institution had become the dominant exchange mechanism in modern capitalist economies. "Market" itself is a complex concept which Boyer (1997: 62-66) variously categorized as:

  6. Primary sector of the economy - Wikipedia

    en.wikipedia.org/wiki/Primary_sector_of_the_economy

    The primary sector of the economy includes any industry involved in the extraction and production of raw materials, such as farming, logging, fishing, forestry and mining. [ 1 ] [ 2 ] [ 3 ] The primary sector tends to make up a larger portion of the economy in developing countries than it does in developed countries .

  7. Value chain - Wikipedia

    en.wikipedia.org/wiki/Value_chain

    A value chain is a progression of activities that a business or firm performs in order to deliver goods and services of value to an end customer.The concept comes from the field of business management and was first described by Michael Porter in his 1985 best-seller, Competitive Advantage: Creating and Sustaining Superior Performance.

  8. Wikipedia:Contents/Human activities - Wikipedia

    en.wikipedia.org/.../Human_activities

    Examples include all fields of engineering. Formal science – branch of knowledge with many subbranches which are concerned with formal systems. Unlike other sciences, the formal sciences are not concerned with the validity of theories based on observations in the real world, but instead with the properties of formal systems based on ...

  9. Informal economy - Wikipedia

    en.wikipedia.org/wiki/Informal_economy

    Statistics on the informal economy are unreliable by virtue of the subject, yet they can provide a tentative picture of its relevance. For example, informal employment makes up 58.7% of non-agricultural employment in Middle East – North Africa, 64.6% in Latin America, 79.4% in Asia, and 80.4% in sub-Saharan Africa. [29]