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Studying an environmental science degree provides you with a broad understanding of current environmental issues and challenges on a local, national and global scale. You learn about the impact humans have on the environment and how to manage it.
<span>As periods in mathematics we call groupings of large numbers (three-digits) usually separated by comma or space.
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In this particular case we got two periods: 913 and 256.
Digits 913 are in the thousands period, while 256 in the units period.