04teacherlin is right. It would be equally accurate to say nature, left alone, "produces" no CO2 at all. Google "carbon cycle". There is a baseline level of CO2 in the air that is continually being removed and augmented - but it's not the same CO2 from moment to moment because it's being circulated through living organisms, the earth, and the sea. The state of the system is stable and self-maintaining, even with a certain level of disturbance.
A disturbance like a volcano erupting? a disturbance like forest fires?
Measuring atmospheric CO2 is therefore a bit like a doctor measuring blood cholesterol levels.
NO IT IS NOT. The earth is not a human being. It does not have a fever. We are not hurting its feelings. Mother Nature does not cry.
It's not an indication of how much cholesterol you're putting into your body, but a measure of how well your body is maintaining a sensible circulating level (cholesterol is used by, and synthesized by, your own body, principally as a raw material for steroid hormones, so it's under active management). If the levels are "off", it's because your body is unable to cope with something you're doing to it - and not necessarily excess cholesterol going in.
Nonsense.
That's why I think Steviebike has a better approach - focus on pollution in general, and its negative effects, and see what we can do to reduce it considerably. Understanding the earth's interlocking control loops, and then setting some arbitrary limit for anthropogenic emissions, seems like a slippery task, at best.
A better approach than whose? climate change alarmists?
In fact, who cares what the limit is? Does it matter if it's 2GT/year, 20, or 50? Are we seriously considering polluting simply because we can? Is nobody interested in whether we need to? Whether we are getting something of benefit in return? The bizarre thing about the modern world is that we've achieved what the pundits said we would: freedom. Provision of everything a human could need, for a relatively low labour input. And what did we decide to fill our leisure time with? More work!
No one is suggesting that we are polluting because we can. This is about setting limits on development. Many of us think that is stupid. Many don't really care about the issue of global warming. They want to control development.
How much of what goes on in the world is done in the name of "creating employment", I wonder? Pick a random middle manager in the local government, or Cargill, or IBM, or Asia Pulp and Paper - would the world stop turning if they stayed at home this year? If the corporation folded entirely, would humanity crumble?
It would for that person if he or she was out of a job. Given that we have 8 to 15 percent unemployment in the developed world, I would suggest that greater concern for those who want to work and cannot might be in order. This is not just about creating a bunch of crap that suburban housewives IN THEIR SUVs go buy becuase they are bored. How AWFUL!
An awful lot of the pollution and waste that goes on is 100% unnecessary, and it would be 110% unnecessary if people would learn how to stop doing things. Fred's fulminating about money-wasting NGOs is really just the edge of that big picture.
I am not sure that you have understood my point, but... if you understand the futile blandering bloviating blundering of so many of these organizations and their "efforts," then we can agree.