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The Center for Urban Forest Research estimates that shade from the 26,000 trees in Claremont, California, saves the city more than 2.1 million kilowatt-hours of electricity per year in reduced air conditioning costs, equivalent to more than $468,000 in savings.
A tertiary source is an index or textual consolidation of already published primary and secondary sources [6] that does not provide additional interpretations or analysis of the sources. [ 7 ] [ 8 ] Some tertiary sources can be used as an aid to find key (seminal) sources, key terms, general common knowledge [ 9 ] and established mainstream ...
Historical method is the collection of techniques and guidelines that historians use to research and write histories of the past. Secondary sources, primary sources and material evidence such as that derived from archaeology may all be drawn on, and the historian's skill lies in identifying these sources, evaluating their relative authority, and combining their testimony appropriately in order ...
Today, history has a broader scope as one of the disciplines interested in human history before the invention of writing. [8] [c] It is controversial whether history is a social science or forms part of the humanities. Like social scientists, historians formulate hypotheses, gather objective evidence, and present arguments based on this evidence.
The primary source used is the one used from a scholarly source, or a very close analogue; The primary source is attributed, allowing readers to understand the origin of the quote; Finally, the use of primary sources should be considered in terms of the policy regarding the use of images. There should not be too many, and they are not required.
Among genealogists, a primary source comes from a direct witness, a secondary source comes from second-hand information or hearsay told to others by witnesses, and tertiary sources can represent either a further link in the chain or an analysis, summary, or distillation of primary and/or secondary sources. In this system, an elderly woman's ...
The Center for Urban Forest Research estimates that shade from the 26,000 trees in Claremont, California, saves the city more than 2.1 million kilowatt-hours of electricity per year in reduced air conditioning costs, equivalent to more than $468,000 in savings.
Ancient history covers all continents inhabited by humans in the period 3000 BC – AD 500, ending with the expansion of Islam in late antiquity. [1] The three-age system periodises ancient history into the Stone Age, the Bronze Age, and the Iron Age, with recorded history generally considered to begin with the Bronze Age. The start and end of ...