How have climates changed over time? A. Regions on the continents that are experiencing warm climates today have generally experienced colder climates in the past, and vice versa. B. Regions on the continents that are experiencing warm climates today generally experienced even warmer climates in the past, and vice versa. C. Earth has experienced warmer temperatures in the past than currently occur. D. Earth has experienced colder temperatures in the pas than currently occur.

Answer: D. Earth has experienced colder temperatures in the past than currently occur.

Explanation: Climate change is a term used to describe the impact of Green house gas emissions all over the world cause different and unfavorable fluctuations in the weather and climatic conditions the world over. The Earth is generally warmer than when compared to centuries before now, the release of green house gases like Carbon-dioxide, Carbon-monoxide etc and other hazardous gases by activities of man has caused the depletion of the Ozone layer causing the Sun rays to have more impact on the Earth than before now.