The Earth’s climate has changed throughout history. In the last 650,000 years there have been seven cycles of glacial advance and retreat. The end of the last ice age about 7,000 years ago marked the beginning of the modern climate era and human civilization. Most of these changes are attributed to small variations in Earth’s orbit.
Climate change is an acute threat to global development and efforts to end poverty. Without urgent action, climate change impacts could push an additional 100 million people into poverty by 2030.