Someone better tell the beetles to get with the global warming program. Their destruction of forests will prematurely release lots of CO2. Perhaps the rats can impose a carbon tax on these critters. These critters better send some donations to the rats or they may face extermination.
Only if the trees are allowed to burn or rot. If they're cut down and turned into lumber and paper, the CO2 won't be released (for a very long time, if ever), and, in addition, if new trees are planted in the same areas, even MORE CO2 will be taken up than the entire older forest (young, growing trees take up far more CO2 than mature forest trees).