I'd like to answer, but you didn't ask an actual question, so i'll take a blind stab.
Short version: CO2 causes general warming. Ice caps on the pole are necessary to keep the planet cool by reflecting a lot of the incoming light. General warming will cause ice caps to melt, which causes more energy from the sun to be absorbed, which causes even faster warming. Permafrost areas will also thaw, releasing CO2 and methane, resulting in even more warming. Strong heat increases can damage rain forests, reducing the CO2 absorption, also speeding up warming. Result: Best case scenario: Loss of coastal regions to sea rise. Worst case scenario: Earth becomes a second Venus.
Edit: To downvoters: If i got facts wrong, please do correct me. The above is my understanding of the sitation and i may have gotten some wrong.
Short version: CO2 causes general warming. Ice caps on the pole are necessary to keep the planet cool by reflecting a lot of the incoming light. General warming will cause ice caps to melt, which causes more energy from the sun to be absorbed, which causes even faster warming. Permafrost areas will also thaw, releasing CO2 and methane, resulting in even more warming. Strong heat increases can damage rain forests, reducing the CO2 absorption, also speeding up warming. Result: Best case scenario: Loss of coastal regions to sea rise. Worst case scenario: Earth becomes a second Venus.
Edit: To downvoters: If i got facts wrong, please do correct me. The above is my understanding of the sitation and i may have gotten some wrong.