Land

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Leaf litter

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material forming a surface-covering layer, in particular.

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Dust bowl

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an area of land where vegetation has been lost and soil reduced to dust and eroded, especially as a consequence of drought or unsuitable farming practice

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Soil erosion

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defined as the wearing away of topsoil. Topsoil is the top layer of soil and is the most fertile because it contains the most organic, nutrient-rich materials.

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farming

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the activity or business of growing crops and raising livestock.

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agriculture

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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.

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grazing

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grassland suitable for pasturage.

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logging

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the activity or business of felling trees and cutting and preparing the timber.

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mining

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the process or industry of obtaining coal or other minerals from a mine

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construction

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the building of something, typically a large structure.

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Recreational activities

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is an activity of leisure, leisure being discretionary time

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Superfund act

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is a United States federal government program designed to fund the cleanup of sites contaminated with hazardous substances and pollutants.

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Superfun site

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is any land in the United States that has been contaminated by hazardous waste and identified by the EPA as a candidate for cleanup because it poses a risk to human health and/or the environment

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Hazardous waste

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poses substantial or potential threats to public health or the environment. In the United States, the treatment, storage, and disposal ofhazardous waste are regulated under the Resource Conservation and Recovery Act (RCRA).

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Toxic

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poisonous.

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Chemically active

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defined as its stability relative to the elements surrounding it on the periodic table

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Corrosive

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tending to cause corrosion.

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Flammable

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easily set on fire.

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Pesticides

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a substance used for destroying insects or other organisms harmful to cultivated plants or to animals.

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Medical wastes

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potentially infectiouswaste materials generated at health care facilities, such as hospitals, clinics, physician's offices, dental practices, blood banks, and veterinary hospitals/clinics, as well as medical research facilities and laboratories.