Why does climate change happen answer in 3-5 sentences ( nonsense report ) Answer: 1) Climate change has become a global cause of concern, especially in the last few decades. 2) Climate change is harming forests, wildlife, water systems as well as the polar region of the Earth. 3) Many species of plants and animals have become extinct due to changes in the climate on Earth. 4) Researchers constantly observe patterns to understand past, present and future climatic conditions. 5) A record of the climate has been accumulated and regularly updated based on geological evidence to study changes.