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Because that would give them a reason to pollute even more.

• onemoresoop 7y ago
  What difference does it make if they collect it though? Yes, they'd claim a bit more but can't claim too much because the storage is limited to some extent. It'd still be better for the environment.
  • kube-system 7y ago
    It is neither feasible nor practical to collect everything that comes out of a hydrocarbon-burning ship's exhaust. We have scrubbing for some of the worst stuff, but there's plenty of stuff that isn't collected. When you burn fuel, you get a mix of those emissions. If burning fuel results in X amount of sulfur and Y amount of CO2, you still don't want to increase the amount of X, even if 100% of it is collected, because Y will also go up and it isn't being collected.