Mesopotamia, located between the Tigris and Euphrates rivers, developed advanced irrigation systems to support agriculture in the arid region.

In classical times, human and animal labor were the main sources of energy for tasks such as agriculture, transportation, and construction.

The Romans engaged in extensive deforestation to clear land for agriculture, construction, and fuel.

The ancient Egyptians primarily used stone, particularly limestone, for constructing their monumental structures, such as the pyramids and temples.

Ancient Chinese agricultural practices, such as crop rotation and the use of organic fertilizers, demonstrated an understanding of sustainable farming.

The Romans constructed an extensive network of aqueducts to bring water from distant sources to supply the city's population and public baths.

The Mesopotamians made significant contributions to astronomy, developing a sophisticated understanding of celestial bodies and creating calendars based on their observations.

Grains, such as wheat, barley, and rice, were the staple foods for most classical civilizations, providing essential carbohydrates and nutrients.

The Roman Empire relied heavily on slave labor, particularly in agriculture, mining, and construction.

Olive oil was a versatile energy source for the ancient Greeks, used for cooking, lighting, and even as fuel for lamps.

The Persians constructed extensive underground canals, known as qanats, to transport water from distant sources to arid regions.

The ancient Greeks primarily used stone, particularly marble, for constructing their temples, theaters, and other public buildings.

Ancient Greek physicians, such as Hippocrates, made significant contributions to medicine, including the development of the Hippocratic Oath and the study of anatomy.

Wood and charcoal were the primary sources of energy for the ancient Romans, used for cooking, heating, and industrial purposes.