**Environmental science -**The study of natural processes that occur in the environment and how human can affect them

Mass extinction- when many types of living thing become extinct at the Same  time

Depletion-reduction in the number or quantity of something.

Agriculture- the art of cultivating the soil, growing crops and raising livestock. It provides the words food.

Radiation-the emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles which cause ionization.

Pesticides- a chemical the kills insects and other crop-destroying organisms

Industrial growth- led to urbanization by creating economic growth and job opportunities that draw people to cities.

Urban development- improvement of an urban area by building- negative is the non farm ownership of farmland

Respiration-the action of breathing.

Ecosystems- a biological community of interacting organisms and there physical environment

Renewable resources- a source that is alway available or replaced in a short time

Non renewable resources- a natural resources that can’t be replace in a short amount of time

Point source pollution- a specific source of pollution that can be identified

Non point source pollution- a widely spread pollution that is difficult to link to a specific point of origin.

Sustainable use- the use of a resource in a way that maintains the resource at a certain quality for a certain period of time.

Land resources- all features and presses of land

Humus- dark colored organic material in soil

Topsoil-The crumbly top most layer of soil made up of clay and other minerals and humus

Soil erosion- a natural occurring process that affects all landforms- wearing away of a field's topsoil.

Overgrazing- grazing too much that it starts to damage the grassland

Drought- a lone pierd of low percifatstion

Desertification- making and area dessert like

Land management- the process of managing the use and development of land resources

Ecology- biology that deals with relations between organisms and there surroundings

Photosynthesis- the process which plants turn light energy to make food

Warming-gerund or present participle: warming

**Temperate forests-**A temperate forest is a forest found between the tropical and boreal regions, located in the temperate zone- 2nd largest biome in the world

Deforestation- the action of clearing a wide area of trees.

Aquatic- relating to water.

Aquaculture-the rearing of aquatic animals or the cultivation of aquatic plants for food.

Smog-fog or haze combined with smoke and other atmospheric pollutants.

Pollutant-a substance that pollutes something, especially water or the atmosphere.

Emissions-pollutants that are released into the air

Acid rain- rain or a form of precipitation that is more acidic than normal, caused by the release of molecules of sulfur dioxide and nitrogen

Freshwater resource - Water resources are natural resources of water that are potentially useful for humans, for example as a source of drinking water supply or irrigation water. 97%

Wetlands- land consisting of marshes or swamps; saturated land

Ozone depletion- reduction in the concentration of the ozone layer

Ultraviolet light- electromagnetic waves with wavelengths that are shorter than visible light

CFC-human made gasses containing chlorine and Fluorine they are the main cause of the ozone depletion

Catalyst- a material that increases the rate of a reading by lowering the activation energy

Cellular respiration- the presses in switch oxygen and glucose undergo a complex series of chemical reactions inside cells releasing energy

Global warming- a gradual increase in the overall temperature of the earth thought to be caused by an increase of greenhouse gasses in the atmosphere

Biodiversity- the variety of life in the world or in a particular habitat

Ecosystem diversity- the variety of different habitats, communities and ecological processes.

Species diversity- the number of different species present in an ecosystem and relative abundance of each of those species

Genetic Diversity -refers to the range of different inherited traits within a species.

Keystone species-a species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically.

Extinction -the fact or process of a species, family, or other group of animals or plants becoming extinct.