and human population growth (e.g., how fast will the human population grow, and what does that mean for climate change, resource use, and biodiversity?). Studying population growth also helps ...

We're in the midst of the Earth’s sixth mass extinction crisis. Harvard biologist E. O. Wilson estimated that 30,000 species per year (or three species per hour) are being driven to extinction.

This increase can be clearly seen in a graph of human population. Scientists are unsure whether this population increase will continue for ever. Some think that the human population will continue ...

This increase can be clearly seen in a graph of human population. better health care so people are living longer new medicines are being developed so people don’t die of previously fatal ...