Glossary of Environmental Science - K

K

• kerbside collection - collection of household recyclable materials (separated or co-mingled) that are left at the kerbside for collection by local council services.
• keystone species - a species that has a disproportionate effect on its environment relative to its abundance, affecting many other organisms in an ecosystem and help in determine the types and numbers of various others species in a community.
• Kyoto Protocol - an international agreement adopted in December 1997 in Kyoto, Japan. The Protocol sets binding emission targets for developed countries that would reduce their emissions on average 5.2 percent below 1990 levels.