Target: eventually, less than 200 million Americans, since this is the sustainable level.

Beijing is trying to ensure economic growth remains at a more sustainable level after 2010's rate of 10.3%.

Our present impact is so far beyond a sustainable level that action must be taken to change both sides of the equation.

I personally believe that we've already passed the point where the human population is at a sustainable level.

Student numbers were not given a chance to build to sustainable levels before closure was announced.

When the banks recovered in 1994, he raised rates back to sustainable levels.

It sees them through times when food is scarce and helps to keep the population within sustainable levels.

Mankind as a whole uses 25% more than the sustainable level of natural resources, which means that we are using up our children's capital.

The first thing to do is to bring the integration of the European economy to a higher and sustainable level.

The fix worked, and temperatures inside dropped to sustainable levels.