Earth will be fine.* Life is just a singular organism that's
  existed for billions of years and we're a part of it. AT some
  point the organism may die, but it will live on whether the
  human shaped cells are still there. I'm not worried.* My
  awareness part will be done, but I'll be part of some other part
  of the organism by then, long recycled naturally in some form or
  another, even if I'm calcified somehow and just act as support
  structure for the planet that the organism lives with.