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<p>because of the role of magnesium in <a href="page.php?w=chlorophyll">chlorophyll</a> and <a href="page.php?w=photosynthesis">photosynthesis</a>). The monohydrate is favored for this use; by the mid 1970s, its production was 2.3 million tons per year with production increasing to approximately 2.6 million tons in 2024. The <a href="page.php?w=hydrate">anhydrous</a> form and several hydrates occur in nature as <a href="page.php?w=sulfate_mineral">minerals</a>, and the salt is a significant component of the water from some <a href="page.php?w=spring_%28water%29">springs</a>.</p><p>
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