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  2. AP Environmental Science - Wikipedia

    en.wikipedia.org/wiki/AP_Environmental_Science

    The percentage of students scoring a grade of "5" was only 7.0% in the 2021 testing administration. It remains one of the lowest "5" scoring AP Exams to this date right under AP Art History, AP English Literature & Composition, AP English Language & Composition, and AP World History. The AP Environmental Science exam was first administered in 1998.

  3. Advanced Placement - Wikipedia

    en.wikipedia.org/wiki/Advanced_Placement

    The exam has two sections: 40 multiple-choice questions on the first and four free-response questions on the second. [57] AP World History: Modern Scoring criteria for the DBQ and LEQ have changed, requiring the use of 4 or more sources for both analysis points. [58] AP Computer Science Principles

  4. Ecosystem service - Wikipedia

    en.wikipedia.org/wiki/Ecosystem_service

    The term environmental services was introduced in a 1970 report of the Study of Critical Environmental Problems, [91] which listed services including insect pollination, fisheries, climate regulation and flood control. In following years, variations of the term were used, but eventually 'ecosystem services' became the standard in scientific ...

  5. I = PAT - Wikipedia

    en.wikipedia.org/wiki/I_=_PAT

    The equation was developed in 1970 during the course of a debate between Barry Commoner, Paul R. Ehrlich and John Holdren.Commoner argued that environmental impacts in the United States were caused primarily by changes in its production technology following World War II and focused on present-day deteriorating environmental conditions in the United States.

  6. Global warming potential - Wikipedia

    en.wikipedia.org/wiki/Global_warming_potential

    The global warming potential (GWP) is defined as an "index measuring the radiative forcing following an emission of a unit mass of a given substance, accumulated over a chosen time horizon, relative to that of the reference substance, carbon dioxide (CO 2). The GWP thus represents the combined effect of the differing times these substances ...

  7. AP English Language and Composition - Wikipedia

    en.wikipedia.org/wiki/AP_English_Language_and...

    The multiple-choice section of the test features 45 questions, divided between 23-25 reading questions and 20-22 writing questions. [3] There are typically 4 short passages divided between pre-20th century non-fiction prose, and 20th and 21st century non-fiction prose.

  8. Biodiversity - Wikipedia

    en.wikipedia.org/wiki/Biodiversity

    Citizen science, also known as public participation in scientific research, has been widely used in environmental sciences and is particularly popular in a biodiversity-related context. It has been used to enable scientists to involve the general public in biodiversity research, thereby enabling the scientists to collect data that they would ...

  9. Carbon sequestration - Wikipedia

    en.wikipedia.org/wiki/Carbon_sequestration

    For example, in the United States, the Executive Order 13990 (officially titled "Protecting Public Health and the Environment and Restoring Science to Tackle the Climate Crisis") from 2021, includes several mentions of carbon sequestration via conservation and restoration of carbon sink ecosystems, such as wetlands and forests. The document ...