[Will]

While it can be argued many ways with carbon dioxide, if it has a significant impact on warming, or insignificant, or even no impact, the cutting of forests does have some impact (at least locally; it would be harder to prove global impact). If you have a large area of trees, they are taking the incoming energy to convert to sugars, and reflecting some back out, but there is little re-radiation as heat. If you have clear-cut land, there is no conversion of energy to create sugars, and a lot more is re-radiated as heat. You can see the effects of things like this by watching a local weather report; temperatures inside a city will consistently be higher than surrounding areas, because all the concrete and non-green land area is turning sunlight into more heat energy than there would be in more "natural" settings.