I think that carbon is quite large problem because it is strong enough to start processes that will then make a capital difference. Plus not all carbon problems are related to warming.
There are days when I wonder about if this entire global warming thing is pumped so much in the media because someone is trying to cover up other environmental issues that are much easier to swallow.
But if someone wants to talk about this we have other threads since I have no intention in sabotaging this one with this.
As for the bees I have few theories.
1.We are using pesticides to protect our crops but one chemical is in the environment you can't control it completly.
For example wind can carry a certain amount to a meadow next to a crops.
2. Big infrastructure can change the amount of moisture in local evlironment.
Plus this can change the growth rate of fungi or certain parasites. What could destabilize entire colony.
3. If human activity is too strong in some area it can destabilize the food chain what could efect species that have large number of individuals in the system.
4. We are relelase very large number of chemicals into the environment so many of them can be assimilated into the plants what can be harmful for many kinds of bugs.
5. Many environments look like they are intact my human hand but that is not the truth. Since we have created an entire comunications networks.
Some field can look as beautyful as they were 100 years ago but the thing is that today many of them are full of cell phone sighnals and TV signals.
6. What could be is easily the most important part here is that they breath through skin. So all the pollution that is released into the environment can easily penetrate their body.
So when you mix all of this you get the odd that could explain things that are observed in the real world.
In a way this is no different then what is happening to amphibians.
Amphibian decline is rapidly worsening