• 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.
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