Quote: "Besides, China will be the greatest world-power in the world, passing by America in 23 years from now on. This will, as it seems now, have a negative impact on nature, but better than the American approach to environmental questions. As China is agricultural and has always bonded to nature, I expect them to actually take care of natural pollution as good as possible."
Err...except for the massive economic depression they are about to hit, the sub-political activity from the new generation, and the soon to be 2:1 male to female ratio. Those might stop it just a little bit..
China is already suffering from draughts and famine, combined with peasants and lower classes putting money into big companies, just like the US stock market worked in the 1920's and 30's, once it reaches a certain point, overnight their fledgling economy might crash into the ground. With all the people who were poor poorer, and the rich poor as well, then this would not bode well for a nation needing the workforce.
Once that ratio comes to terms, then the effective need to end a tradition, or else parish from lack of reproduction will become absolute, already being needed, but not used.
Top this off with the people wanting democracy, or atleast a new government, a long revolution is insured...
I believe that at this point, America will find itself becoming more self dependant, as is needed to overcome the oil crisis. The last reserves of oil the US will use from its huge reserves, and the switch to corn ethanol will be radical. Not only will this huge expenditure end, the economy will be boosted from american corporate ownership of the main energy need.
The US will most likely at this point turn into a more isolationist country, as our need to secure the world so we can survive will end from the lack of need of the rest of the world.
At this point the US political nature will erupt into either new political parties, or into a civil war from the split caused by the main parties.
Time is ticking away.