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when did global warming start

how does the earth spin

have you ever seen a water salamander

why do people get edictied to ps games

do you think FORTNITE is good or bad for young adults or children

How are plants alive

how are camreas made

How do you check how good a rivers quality is?

Do freshwater pearl mussels have a purpose or are they just there in our rivers?

are freshwater pearls dangerous to us