The degree to which the ambient air is pollution-free, assessed by measuring a number of indicators of pollution.
What is Air Quality
100
The artificial application of water to the land or soil. It is used to assist in the growing of agricultural crops, maintenance of landscapes, and revegetation of disturbed soils in dry areas and during periods of inadequate rainfall.
What is Irrigation
100
Materials or substances such as minerals, forests, water, and fertile land that occur in nature and can be used for economic gain
What is Natural Resource
100
The science or practice of farming, including cultivation of the soil for the growing of crops and the rearing of animals to provide food, wool, and other products.
What is Agriculture
100
What once covered 14% of the Earth's land area, but by 1991 over half had been destroyed?
What is Rainforest
200
The production and discharge of something, especially gas or radiation
What is Emission
200
The clearing of trees, transforming a wooded area into cleared land.
What is Deforestation
200
A source of energy that is not depleted by use, such as water, wind, or solar power.
What is Renewable Resource
200
The quality of not being harmful to the environment or depleting natural resources, and thereby supporting long-term ecological balance.
What is Sustainability
200
Which of the emissions from cars are acidic?
What is Nitrogen Oxides
300
A shift in global or regional climate patterns, in particular a change apparent from the mid to late 20th century onwards and attributed largely to the increased levels of atmospheric carbon dioxide produced by the use of fossil fuels
What is Climate Change
300
The process of compounds like ammonia, nitrogen oxides and sulphur dioxides converting a chemical reaction into acidic substances. Most of the compounds are a direct result of air pollution.
What is Acidification
300
A natural fuel such as coal or gas, formed in the geological past from the remains of living organisms.
What is Fossil Fuel
300
Characterized by engaging in production or service of a commodity developed in factories.
What is Industrial
300
What name is given to the huge growths of algae sometimes seen in polluted lakes and rivers?
What is A Bloom
400
A gas that contributes to the greenhouse effect by absorbing infrared radiation, e.g., carbon dioxide and chlorofluorocarbons.
What is Greenhouse Gas
400
The process of increasing the salt content, usually takes place in soil or water.
What is Salinization
400
A resource of economic value that cannot be readily replaced by natural means on a level equal to its consumption. Most fossil fuels, such as oil, natural gas and coal this.
What is Non-Renewable Resource
400
Relating to or denoting the generation of electricity using flowing water (typically from a reservoir held behind a dam or other barrier) to drive a turbine that powers a generator.
What is Hydroelectric
400
What is the name of the process by which substances are washed out of the soil?
What is Leaching
500
The process of removing carbon from the atmosphere and depositing it in a reservoir
What is Carbon Sequestration
500
Excessive richness of nutrients in a lake or other body of water, frequently due to runoff from the land, which causes a dense growth of plant life and death of animal life from lack of oxygen.
What is Eutrophication
500
Of, relating to, or produced by the internal heat of the earth.
What is Geothermal
500
The flow of water that occurs when excess water from rain, meltwater, or other sources flows over the earth's surface. This might occur because soil is saturated to full capacity, or because rain arrives more quickly than soil can absorb it.
What is Surface Runoff
500
What contributes to the greenhouse effect at lower atmospheric levels, but in the upper atmosphere protects life on Earth?