Broeikaseffect
Global warming frequently asked questions
http://www.ncdc.noaa.gov/ol/climate/globalwarming.html
Verwering
Verwering
http://www.uh.edu/~jbutler/physical/chapter6notes.html
Verdroging
Verdroging
http://www.milieuloket.nl/9292000/modulesf/vg1eddnee000
Vermesting
Vermesting
http://www.milieuloket.nl/9292000/modulesf/vg1zexyk6000
Verzuring
Verzuring
http://www.milieuloket.nl/9292000/modulesf/vfyfeh7x4000