Columbia University: The Earth Institute (inglese):
www.earthinstitute.columbia.edu/sections/view/9

Post Carbon Institute (inglese):
www.postcarbon.org/

UNEP, World Conservation Monitoring Centre (inglese):
www.unep-wcmc.org/

ONU, Organizzazione per l'alimentazione e l'agricoltura (FAO) (inglese, francese, spagnolo):
www.fao.org/

IPA Circumarctic Permafrost and Ground Ice Map (inglese):
www.grida.no

The world glacier monitoring center (inglese):
https://wgms.ch/

European Environment Information and Observation Network (inglese):
www.eionet.eu/

Ministero dell'Ambiente italiano:
www.minambiente.it/ 

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