As valoracións economicas dos danos no medio ambiente  

A Foz: o esteiro do río Miñor

Axenda 21                           

BALLERINA -Baltic Region

Baltic Sea region statistical database

Baltic University Programme

CENEAM

Centro IRIS de medio ambiente

Convenio CITES

Ecolink-Dinamarca

EcoWeb-Universidad de Virginia

GAIA Multi-media for EA

InterNatura     

Links-Baltic See Region

National Councils for Sustainable Development

Nodo50.Telemática Antagonista

Ourense Natural.

Presa do Umia

Quercus

Ramsar Convention

Report Subsidizing Unsustainable Development

Revista Worlwatch

Seaweb  

SD Gateway  

Sierra Club   

Software ambiental

TerraBit

The Earth Charter Consultation

The Earth Network for Sustainable Development

IUCN - The World Conservation Union 

UNEP-Programa de Nac.Unid. para M.A

WWF Global Network