<span><span>Primary sources are original materials on which other research is based, including:<span>original written works – poems, diaries, court records, interviews, surveys, and original research/fieldwork, andresearch published in scholarly/academic journals.
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Secondary sources </span>are those that describe or analyze primary sources, including:<span>reference materials – dictionaries, encyclopedias, textbooks, andbooks and articles that interpret, review, or sythesize original research/fieldwork.
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Tertiary sources are those used to organize and locate secondary and primary sources.<span>Indexes – provide citations that fully identify a work with information such as author, titles of a book, artile, and/or journal, publisher and publication date, volume and issue number and page numbers.Abstracts – summarize the primary or secondary sources,<span>Databases – are online indexes that usually include abstracts for each primary or secondary resource, and may also include a digital copy of the resource.
Hope this helps! :D</span></span></span></span>
Answer:
The most populated areas. Because they have the most carbon emissions and the most pollution
Explanation:
Answered By Huntermike976
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Please mark brainliest
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