No bigotry: Including racism, sexism, homophobia, transphobia, or xenophobia. Code of Conduct.
Be respectful. Everyone should feel welcome here.
No NSFW content.
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Be thoughtful and helpful: even with ‘stupid’ questions. The world won’t be made better or worse by snarky comments schooling naive newcomers on Lemmy.
It really depends where you live. Some places are very dusty, especially if it's generally dry and/or windy.