The report attempts to outline and estimate the interactions between climate change and atmospheric chemistry that need investigation on both local and/or regional and global scales. The problem is enormously complex and is not simply one of estimating temperature change and running chemical models already in use. The changing climate influences many different factors such as precipitation, atmospheric transport, changes in budgets of species with biological sources, changes in UV light because of stratospheric ozone depletion, changes in deposition rates, etc. The single most significant finding in the study is that very little is known about the interactions of the above cited effects with either climate or air pollution. Current analyses suggest that it is improbable that present trends towards increasing concentrations will be arrested or reversed in the near future.