Sure, I have now reduced the Earth’s gravity to 9.80664% of it’s previous value (i.e., ~0.96m/s²) by removing material in the Earth’s core and mantle. Everything on Earth now weighs less than on the moon. Earthquakes shake the planet, massive fissures swallow cities whole, and the atmosphere begins to disperse into the vacuum of space. Humans barely have enough time to escape to the moon and Mars: the vast majority are left behind. On the bright side, your back no longer hurts:

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