I'm talking everyone got together in the same place... and everyone that could drive took their cars. Would the earths rotation be thrown off?
idk, but the time it takes earth to make one rotation (as in a day not a year) grows 1/500th of a second longer each century. doesnt answer your question but i thought it was interesting.
All the organisms on earth weigh infintessimally less than the earth itself. Mind boggling, no? The only things that will fuck with earth's rotation are changing the axis of the planet or fucking with the moon.