41 terms

Important vocabulary/course 2

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global warming
a general increase in world temperature
the greenhouse effect
the gradual warming of air surrounding the earth because heat cannot escape into space
ozone depletion
the thinning out of ozone layer in the earth's atmosphere
acid rain
rain containing sulphuric acid and nitric acid
mean temperature
how hot or cold the weather is on average
carbon dioxide
the gas produced when carbon is burned or when animal or vegetable matter decays
oxygen
a tasteless, colourless, and odourless substance necessary to all forms of life
a drought
a period of time with no rain
ultraviolet radiation
rays of light which can be harmful in large doses
sewage
waste water
polar ice caps
glaciers covering the regions around the North and South Poles
ocean currents
continuously moving streams in big seas
a flood
a great overflow of water
eutrophication
abundance of nutrients supporting dense growth of plants in water, which depletes shallow waters of oxygen
a dam
a wall built to keep water back
desertification
the formation of very dry areas as a result of human activity
agriculture
the art and practice of farming and growing crops
erosion
the wearing away of topsoil by wind and water
irrigation
the system of supplying water to dry land
a fertilizer
a substance put on the land to make the crops grow better
biodegradable
can be broken down into harmless substances by the natural action of living things
a landfill site
a place where waste material is dumped
toxic waste
poisonous refuse
contamination
being made bad by dirty or poisonous matter
exhaust fumes
vehicular emissions
recycling
reusing tings that have already been used
flora and fauna
plants and animals
conservation
preserving and protecting wildlife
biodiversity
all different types of plants and animals
extinction
the dying out of species
organic
produced without the help of artificial chemicals
sustainable development
development does not harm the environment
cruelty-free
not tested on animals
indigenous
growing or living naturally in a certain country
herbicide
a chemical substance to kill weeds
pesticide
a chemical substance used to kill insects
natural resources
materials (minerals, oil, forests, etc.) that exist in a place (third world countries) and can be used by humans
poaching
illegal hunting
disposable
thrown away after being used
deforestation
loss of woodlands
afforestation
the opposite of deforestation