"There are a number of climatic issues at stake, the first is the important issue as to whether the climate is actually changing. Unfortunately there are a large number of vocal wingnuts who do not accept that the climate is actually changing. Absurd as this stance is, it is one that needs to be addressed. You cannot have a rational conversation with someone about their car use warming the Earth if they refuse to accept that the Earth is actually warming."
First, name calling invalidates your argument. So first and foremost, you lost. Congrats.
Second, climate means changing temperature. Climate does not mean it is 80 degrees and sunny every day. The Earth can be warming without the climate changing. Climate change automatically implies that the fluctuation in temperature and other climate indicators are outside of the harmonic bounds of the function.
I think just about everyone is OK with the Earth warming. There were some issues early on with data collection methods being irregular, but they mostly seem to check out. So what is next?
1.) Is the climate changing?
For the climate to be changing, it must be warmer or colder now than it has ever been on the planet. We know that this is not true. It has been warmer and colder in the past.
2.) Is it because of CO2?
CO2 is a natural trigger within the environment. CO2 is released or taken in by the environment regularly and is a natural process.
3.) Is it because of mankind?
If humanity was indeed releasing too much CO2 from the environment, the response would be for the remaining natural resources to correct for it. This is a long term process and would still allow for short term changes. So while it would be theoretically possible for mankind to change the climate in the short term, in the long term it should be impossible. Unless of course you believe that mankind can generate CO2 and/or heat more rapidly than the sun, in which case you might need to return to the text books.