知识世界

Environment:Technology Starters——The War against Water

For hundreds of years, people have been fighting against flood by building dams. The landfrom of Europe varies greatly. Some areas are mountainous. Alps is located at the heart of Europe and is the highest mountain in Europe. Other areas are very flat and low-lying, Holland is one of the most low-lying areas. The whole area of Holland is below the altitude. The Holland people built dams to back off the ocean.

• 01

  Environment： The Infinite Voyage —— Crisis in the Atmosphere

  
• 02

  Environment： Thirsty Planet（1）

  
• 03

  Environment： Waves in the Ocean

  
• 04

  Environment： Ice Worlds: Life at the Edge

  
• 05

  Environment： Something in the Air

  
• 06

  Environment： Building Blocks

  
• 07

  Environment： The Pond - Community Ecology in Action

  
• 08

  Environment： The Endless Voyage — Survivors

  
• 09

  Environment： The Nature of Things——The Living City

  
• 10

  Environment： It's in the Water