In that case, the most sensible treatment for organic waste is careful incineration, so that at least its energy content can be exploited.

In that case, the most sensible treatment for organic waste is careful incineration, so that at least its energy content can be exploited. But often, by-products do not form the bulk of the waste Solvents do. What is so good about supercritical CO2? Wouldnt its widespread use contribute to climate change?