Humans do not invest in, nor do they take care of or clean up things they cannot own.
These seem rather quaint concepts when talking about space.
Unlike the oceans or our home-planet, space is vast. Apart from some tiny areas where cleaning is mandatory (e.g. our own orbit, or common travel-routes) it just doesn't care about the scales of waste that we can possibly shoot in any general direction.
Yes, corporations will own things in space, e.g. planets that we will mine for resources.
But space itself is indeed best likened to the oceans. We'll pollute it just like the oceans, but in this case it will (gladly) most likely not matter.
These seem rather quaint concepts when talking about space.
Unlike the oceans or our home-planet, space is vast. Apart from some tiny areas where cleaning is mandatory (e.g. our own orbit, or common travel-routes) it just doesn't care about the scales of waste that we can possibly shoot in any general direction.
Yes, corporations will own things in space, e.g. planets that we will mine for resources.
But space itself is indeed best likened to the oceans. We'll pollute it just like the oceans, but in this case it will (gladly) most likely not matter.