Determining If Climate Change is Man-Made or Natural – NASA

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URL:

http://earthobservatory.nasa.gov/Features/GlobalWarming/page4.php

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Sample:

“In Earth’s history before the Industrial Revolution, Earth’s climate changed due to natural causes not related to human activity. Most often, global climate has changed because of variations in sunlight. Tiny wobbles in Earth’s orbit altered when and where sunlight falls on Earth’s surface. Variations in the Sun itself have alternately increased and decreased the amount of solar energy reaching Earth. Volcanic eruptions have generated particles that reflect sunlight, brightening the planet and cooling the climate. Volcanic activity has also, in the deep past, increased greenhouse gases over millions of years, contributing to episodes of global warming.

These natural causes are still in play today, but their influence is too small or they occur too slowly to explain the rapid warming seen in recent decades. We know this because scientists closely monitor the natural and human activities that influence climate with a fleet of satellites and surface instruments.”

Description:

Article from NASA discussing the science behind the idea that climate change is strongly influenced by human activity even though it is partly natural.

Author(s):

  • None.

Title:

  • Is Current Warming Natural?

Publisher:

  • NASA

Date:

  • No date.

Citations:

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MLA 8

The 8th edition of MLA has resulted in changes to the citation format. Correcting the citations on our website will take some time. Until then, please reference the guidelines below to correct the citation format. You will still be using the information provided here, but you may need to adjust the format for MLA 8.

Most MLA citations on our site should follow this format:

Author, A. Title of Source. Publisher, Date, URL. Accessed, 1 Jan 2050.
"Web." removed
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For citing an article in a scholarly journal you will use the journal title instead of publisher, and retain any volume, issue, and page numbers. Use a DOI in place of URL if one is available.

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