Offers niche web directory with Environmental and heart science related resources.

http://webdirectory.com [ heart science ]

    Non-profit EnviroLink Network is a clearinghouse for environmental information on the Internet, featuring daily news, sustainable business information, active user-forums, natural products and a comprehensive library of environmental resources on the Internet.

http://www.envirolink.org/ [ environmental resources ]

    An environmental directory for environmental products and services such as groundwater pumps, water pollution monitoring, air pollution monitoring equipment, contaminated waste disposal, and groundwater well drilling.

http://www.environmentalfinder.com/ [ Environmental Directory ]