1. Atmospheric Environment : Lessons we’ve learned

2. Basic Structure of the Atmosphere
The atmosphere is thin and fragile – 90% of the air lies below 16 km, 99% lies below 30 km. Its properties can be significantly influenced by both natural and anthropogenic factors.

3. The atmosphere has changed and will continue to change
The atmosphere has evolved from a weakly reducing atmosphere in the pre-biological era to an oxidizing atmosphere.
As a physical system, the atmosphere will respond to external “forcing” and continue to evolve until a new equilibrium state is reached.

4. There had been many discoveries and developments in the 20th century
We have had an unprecedented understanding of the nature —including the atmospheric and oceanic environment
Powerful new technologies developed and huge industrial bases established — not all of them are beneficial

5. We understand better the weather processes, but there are still many gaps

6. We understand relatively little about how climate changes

7. At the same time, human activities have shown their impacts on the atmosphere

8. Global climate change due to anthropogenic factors

9. Global change in atmospheric chemistry

10. Not only scientific issues
How to maintain economical growth
How to minimize environmental damages
How to deal with legal issues
How to deal with international politics
Etc.

11. Republic of Atmosphere There is only one atmosphere