[badminton1]

Consider this: In 1950, population was 2.5 billion.

In 2000, 6 billion (i.e: 2.4x in only 50 years)

In 2010, 7 billion (16% growth in only 10 years)

Is this sustainable? clearly not the way things are right now.

[overcast]

The population growth rate is steadily declining. The last hundred years, is not going to be reflective of the next hundred. http://www.worldometers.info/world-population/#growthrate As the bigger countries like India get more and more industrialized, they will level off too.

[refurb]

Considering that some population forecasts are assuming a peak population in the not to distant future, I'd say, yes, it's sustainable.