Even after 1000 years, the ancient Persian vertical-axis windmills are still operational today.

So far, the earliest known windmill designs can be traced back to ancient Persia 3000 years ago, where people used windmills to grind grain and pump water. Bundle the reeds together to form mutually perpendicular pulp that rotates around a central axis. Carefully position the exterior walls to ensure that the wind can drive the potential two-way system to move in the desired direction. Of course, the use of wind power in navigation predates the invention of windmills, but these windmills are the earliest known devices that use wind power to automatically replace manual labor for daily work.

There are also many ingenious uses of renewable energy around the world to help ancient people meet their production and living needs.

A windmill used in ancient Persia. The earliest known windmill designs can be traced back to ancient Persia 3000 years ago, where people used windmills to grind grain and pump water. People bind reeds together to form mutually perpendicular pulp that rotates around a central axis. The exterior walls are then carefully placed to ensure that the wind can drive the potential two-way system to move in the desired direction. Of course, the use of wind power in navigation predates the invention of windmills, but these windmills are the earliest known devices that use wind power to automatically replace manual labor for daily work.

The ancient Romans left behind many large and exquisite buildings and projects, among which the gravity canal invented at that time is still in use today. These canals are not only ancient pipe wonders, but also examples of the early use of water power for industrial production and life. In addition, the ancient Romans also used their hydraulic mining technology to survey, roll and clean ores.

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