Of course this matters to me. On the other hand, people do not need to dramatize this, the environment recovers itself partially. This is a good example of what we call a dynamic balance: nature recovers itself up to a certain limit. Once this limit is reached, the problems will have such an impact that they can't be auto-resolved. And to that point we need to pay attention!
In theory this isn't an issue right now, but everything takes its time, both the damage and the recovery. If one doesn't pay attention right now, this will only be a problem within twenty years. Therefore it is wise to consider the Kyoto protocol as way of precaution.