This is the homepage of "Perspectives on Population Issues" from Keith Montgomery of the University of Wisconsin. Here, you'll find links to Thomas Malthus's classic essay on the subject, as well as links to articles and other resources.
"Appropriate technology" usually refers to that which is sustainable into the future and includes technology involved with energy, agriculture, and community planning. Take a visit to the homepage of the National Center for Appropriate Technology for an overview. What did you discover there? Where could you go online to find differing views?
Interested in learning more about the problem of poverty, but not sure where to start? Try the homepage of the Institute for Research on Poverty.
The Atlantic Monthly online has put together this collection of fourteen articles about poverty, with titles like "The Black Gender Gap," "The Next Liberalism," and "The $6000 Solution."