Click on a term to go to the online illustrated glossary. Many terms include an image (click on “eye” icon) and a pronunciation guide (click on “speaker” icon). The linked word should appear at the top of the page unless it is at the end of a Glossary section (A-D, E-H, I-M, N-R, S-V, W-Z).
acid rain
biodiversity
biological diversity
desertification
hydrological cycle
ozone
PAN
peroxyacetyl nitrate (PAN)
photochemical reaction
primary pollutant
secondary pollutant
seed bank