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While Earth’s climate is constantly changing in various ways, the planet tends to experience long-term trends toward either warming or cooling. The potential or actual contribution of postindustrial human activity to climate change, the consequences of that contribution, and the proper response to those consequences remain matters of crucial importance and significant debate.

Research methodology refers to the various methods--whether procedures or processes--by which research is developed and conducted. There are numerous Research Starter articles related to this topic. The list below includes the most relevant Research Starter items.

Racial and ethnic discrimination has existed in various forms throughout US history. Indeed, it has often been a powerful force in shaping the nation, and it intersects in complex ways with virtually every facet of American society. Responding to racial and ethnic discrimination and conflict has been particularly challenging for the US government, given the immigrant nature of American society and the long-standing commitment to the principle of equality before the law in the country’s political culture.

DEFINITION: A helping profession that focuses on the care of the sick and disabled and on the maintenance of the health and well-being of all individuals

ANATOMY OR SYSTEM AFFECTED: All