(November 2007) Since 1991, Earth & Sky has worked with thousands of scientists to produce more than 5,000 radio spots on night sky astronomy, and on sustainability needs and strategies for the 21st century.

Carl Haub, PRB’s senior demographer, talked with Earth & Sky producers Deborah Byrd and Joel Block about world population. Listen to the interviews:

What Will It Mean to Live in an Urban World?” 

How Many People Will Live on Earth in 2100?

Future Directions of Global Population Growth” 

Highest Population Growth Among Rural Poor