Human Impacts on Biosphere

Renewable Resource
resource that can regenerate quickly and that is replaceable.
Nonrenewable Resource
resource that can not be replenished by natural processes
Sustainable Use
using natural resources at a rate that does not deplete them
Soil erosion
wearing away of surface soil by water and wind
Desertification
in areas with dry climates, a process caused by a combination of poor farming practices, overgrazing, and drought that turns productive land into desert.
Deforestation
destruction of forests
Pollutant
harmful material that can enter the biosphere through land, air, or water
Agriculture
the practice of farming
Subsistence Hunting
the practice of hunting only to acquire basic necessities for survival; makes relatively few demands on the environment
Green Revolution
introduction of intensive farming practices that lead to a substantial increase in crop yields
Biodiversity
the sum total of the variety of organisms in the biosphere
Smog
gray-brown mixture of chemicals that occurs as a haze in the atmosphere.
Acid Rain
rain containing nitric and sulfuric acids
Ecosystem Diversity
variety of habitats, living communities, and ecological processes in the living world
Species Diversity
number of different species in the biosphere
Genetic Diversity
sum total of all the different forms of genetic information carried by all organisms living on Earth today
Extinction
disappearance of a species from all parts of its geographical range
Endangered Species
species whose population size is rapidly declining and will become extinct if the trend continues
Habitat Fragmentation
splitting of ecosystems into small fragments
Invasive Species
plants and animals that have migrated to places where they are not native
Conservation
wise management of natural resources, including the preservation of habitats and wildlife
Global Warming
increase in the average temperatures on Earth
Ozone Layer
band of ozone, a gas made up of three oxygen atoms