Concept:The greenhouse effect leads to climate-related impacts on the environment and humans.
Solution: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:Option C (I, II and III only)