Concept:The greenhouse effect leads to climate-related impacts on the environment and humans.Explanation:I. Flooding of coastal cities is a consequence due to rising sea levels.II. Desertification of fertile areas is a consequence of climate change.III. Increased number of storms is a consequence of a warmer atmosphere.IV. Increased use of fossil fuels is a cause of the greenhouse effect, not a consequence.Therefore, the correct consequences are I, II and III only.Answer:C. I, II and III only