Yes, good point. I knew that but somehow it escaped me when I wrote the post. My point was, the global ecosystem can handle the release of some carbon by human

Yes, good point. I knew that but somehow it escaped me when I wrote the post. My point was, the global ecosystem can handle the release of some carbon by human activity without a problem; we don't need to go to zero. However, the sooner and farther we reduce carbon output, the faster we reduce excess carbon in the atmosphere. There's nothing magic about zero; negative output would help too.