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Most of Earth's water (about 97%) is - salt water in the oceans
One group of gasses that is responsible for destroying ozone in the ozone layer is - CFCs
To create less waste in the first is to - Reduce
A type of landfill designed to hold municipal solid waste safely is - sanitary landfill
The process of restoring an area of land to a more natural, productive state is - land reclamation
The study of natural processes in the environment and how humans can affect them is called - environmental science
Which of the following is considered a renewable resource? - Sunlight
Which of the following is a point source of pollution? - An oil spill from a truck
Which of these is NOT an essential natural resource that humans depend on for survival and for development? - gold
Using land to grow food crops is an example of - Agriculture
Chemicals that kill crop-destroying organisms are called - pesticides
The water and human wastes that are washed down sinks, showers, and toilets are called - sewage
Water that causes erosion picks up - sediments
Filters and settling tanks remove solid materials from wastewater during the - Waste treatment step
People cannot use most of the freshwater on Earth because it is in the form of ______ - Ice
The ozone layer is important because it helps to screen out harmful - Uv radiation
Three general categories of environmental issues are related to pollution, resource use, and - population growth
A low level of resource use means a larger ecological footprint. - false, higher ecological footprint
Metals and minerals are renewable ocean resources. - False
The water and human wastes that are washed down sinks, toilets, and showers are called sewage. - True