i totally agree with you happygrump. we don't know if reducing CO2 emissions will really help, but it is certainly worth a try. the problem is, everyone is too comfortable in their present lifestyle and are not willing to make small changes and sacrifices. and no we can't stop gases fdrom forest fires or volcanoes, but we can do something about human's effects on the environment. there are many other problems related to the destruction of the environment, if there was more of a concern, then perhaps we could avoid or slow down such problems.