It's not usually used in that context, though. For instance, i hear (generally progressive) environmentalists use the term "Mother Earth" far more than I do conservatives.
That's true, but you also never hear "Father Earth" from anyone, regardless of their political leanings. Even progressives aren't immune to a little sexism, so long as it goes the opposite direction. "The Earth is a kind giver, therefore it must be a woman."
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