Environmental Performance Index (EPI)
https://epi.yale.edu/
Yale University's Environmental Performance Index scores countries in two main areas of environmental performance: protection of human health and protection of ecosystems. Countries are further scored on sub-categories such as air quality, biodiversity, forests, and water resources. There are various to0ls to rank and compare countries' index scores, and the EPI data are also available for download. Data from this project are also available via Columbia University's Socioeconomic Data and Applications Center. The EPI data are also included within the Quality of Government Institute's Standard Data.
Environmental Sustainability Indicators and Trends
https://sedac.ciesin.columbia.edu/theme/sustainability
This site, which is hosted by Columbia's Socioeconomic Applications and Data Center, compiles links to various sources for data and other sources on sustainability. Be sure to check out SEDAC's other data resources for data on other environment-related topics.
Environmental Treaties and Resources Indicators - ENTRI
https://www.ciesin.columbia.edu/data/entri/
ENTRI is a searchable database of environmental treaties that allows users to create profiles of particular countries with regard to environmental treaties and agreements. Users can also search for treaties by topic of coverage and search through or browse full texts of treaties. Note that the ENTRI database is no longer being updated. For more up-to-date data on treaty participation and texts, see ECOLEX at https://www.ecolex.org/.
World Resources Institute - Maps & Data
https://www.wri.org/resources
The World Resources Institute has compiled a variety of data resources on topics such as emissions, locations of power stations, usage of clean technologies, and agriculture.