Among the nation's 25 most populous cities, Baltimore, Detroit, Memphis and Philadelphia recorded population declines.
This could accomplish more than simply slowing population declines.
Were population declines the result of falling prosperity, or were population declines the cause of declining prosperity?
The threat of extinctions and population declines is set to rise rapidly as a result.
These changes are not yet fatal, but they may cause long-term population declines.
Butte has been plagued by lost jobs, business failures, population declines and festering toxic waste.
As Africa's population increases, the productivity of the land supporting this population declines.
Some colonies have grown substantially since the 1960s, whereas others have experienced sustained population declines.
In areas where oiling was heavy, some crab and crustacean species saw significant population declines.
Many temperate-zone pigeons show marked population declines during the year.
But this will be followed by accelerating decline, as the working-age population declines even faster than in Japan.
