Nature will always correct the cycles - whether it be the Carbon cycle, water, nitrogen, etc. Most of us has seen first-hand how nature corrects the cycles in our tanks. Even if we try to influence the cycle by speeding it up (dosing more) - it still corrects itself. Will humans survive the correction to the carbon-cycle? only time will tell.
What nature does not have a way of correcting is the all the man-made structures and trash that we are placing on the earth. I think we are so eager to blame the warming on a single substance (C02) that we are overlooking other causes of warming. Look at all the roads and rooflines (made from asphalt, tin, and other man-made substances). These man-made objects increase the temperature immediately. This can easily be proven by standing outside on a hot summers day in a grassy field and then move onto a rooftop or in the middle of a street. The heat is immediately felt.
Even the scientists and computer models show that the weather above big cities has been altered over the years - but I think they are wrong in believing it is C02 causing the change. I think the change is caused by something much more simple and immediate - the man-made structures. Most of the science studies claim to show that the increase in temperature corresponds with the 'industrial revolution' and the rise of our use of oil... however, we also started to pave our roads with asphalt (an oil-based product) instead of natural stone and we replaced our thatched roofs with shingles about the same time-period.
Consider this, most scientist agree that the majority of the temperature increase takes place in the so-called 'developed countries' of the world - yet what makes a country 'developed'? That country's use of oil? No. It is the country's roads and buildings. We are taking what used to be a natural setting (grassy fields, forests, etc) and turning them into black pavement, steel, tin, and other man-made substances that captures more heat.
The reason global-warming alarmists don't want to look at the much more obvious cause of global warming is because they can't make money off not-building roads or houses. They want to live in a house and drive on roads too (even an electric car still drives on a paved road).
I believe - even if we somehow made all industry 'carbon-neutral' and even if everyone drives electric cars and even if all electricity is created by renewable sources, the earth will still warm up. Why? Because the earth does not have a way of dealing with the man-made structures and changes we make to its landscape.