1. the planet is a finite system, it has a defined size and limited resources, and the amount of solar energy available to earth is not infinite 2. no, we can

1. the planet is a finite system, it has a defined size and limited resources, and the amount of solar energy available to earth is not infinite 2. no, we can replace melanin with chlorophyll and we'll be ok, if we can imagine it 3. has elon started selling tickets yet? Agree: we are doomed.