Listserv is an electronic mailing list software application. Electronic discussion of technical and nontechnical issues conducted by electronic mail. Participants subscribe via a central service, and lists often have a moderator who manages the information flow and content . Electronic discussion lists, which you can subscribe to, read, and respond to using E-mail. There are thousands of Internet listservs, covering close to all scholarly and popular topics.

Following are some of the websites for discussion forums on the thematic area - Population, Environment and Poverty :

Globalization, Development and Poverty: Online Discussion - Email discussion forum focusing on the impact of globalization on development and poverty. The whole discussion, which was conducted between May 1 and May 31, 2000, is accessible through an on-line archive.
http://www.worldbank.org/devforum/forum_globalization.html

The Population Reference Bureau informs people around the world about Population, Health and the Environment, and empowers them to use that information to advance the well-being of current and future generations. This discuss Online feature of PRB gives monthly "live online" access to PRB's expert staff on noteworthy and newsworthy population, health, and environment topics, trends, and issues.
http://www.discuss.prb.org/