Summary:
- The Industrial Revolution began in the late 1700s.
- It changed the source of power from humans to fossil fuels.
- This allowed more work to be done and more food to be grown.
- The Green Revolution began in the mid-1900s.
- It increased the productivity of farms immensely.
- Health care has been improving over the most recent centuries.
- Vaccines were developed that could prevent many diseases.
- Antibiotics were discovered that could cure most infections caused by bacteria.