知识世界

Environment:Sewage Treatment

In nature, animals discard waste everywhere. But why isn't nature full of waste? Because some creatures feed on these waste and the waste will return to the soil, air and water. However, in cities people don't want to live with waste all around them, although the waste will decompose themselves. We pay much attention to the sewage treatment in the city, in order to create a better environment for living.

• 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