Environmental Horticulture

Articles about the Earth, its natural environments, and their interaction with society. The Encyclopedia is a free, fully searchable collection of articles written by scholars, professionals, educators, and experts who collaborate and review each other's work.

Links to UN environmental agencies and treaties

The online National Library for the Environment contains seven free information resources: hundreds of up-to-date issue reports, environmental education programs and resources; environmental laws including local, state, federal and international; an in-depth resource on Population-Environment linkages; a virtual library of Ecology and Biodiversity; information on environmental conferences and meetings; and Environmental Careers and Jobs.

EnviroLink is a non-profit organization… a grassroots online community that unites hundreds of organizations and volunteers around the world with millions of people in almost every country in the world.

An independent executive agency of the United States federal government tasked with environmental protection matters.

Researchers at the Massachusetts Institute of Technology's Senseable City Lab, a research initiative studying the impact of technology on urban life, has created a data visualization called Treepedia illustrating how green major cities are on a block-by-block basis.

A organization to promote gardening