Alkalinity - A measure of a material's ability to neutralize acids.

Atmosphere - The layers of gases that surround the Earth.

Avian - An adjective describing something that relates to birds.

Bioaccumulation - An accumulation of pollutants larger than what occurs naturally.

Biodegradable - A substance's ability to decompose naturally.

Chlorofluorocarbons - Nontoxic, nonflammable chemicals used to manufacture aerosol sprays, solvents and refrigerants.

Conservation - Environmental protection and the responsible use of natural resources.

Ecology - The study of relationships between organisms and the environment.

Environment - The air, water, soil and all living things that make up the Earth and how they interact.

Environmental Protection Agency (EPA) - Environmental protection agencies that operate at either federal or state levels. For example, there is a U.S. EPA, which operates separately from the Ohio EPA.

Fluorescent lamps - Lamps that emit light through electromagnetic radiation.

Greenhouse gas - Naturally occurring gases in the atmosphere that magnify heat from the sun. A certain level of greenhouse gases is necessary to prevent the Earth from icing over.

Groundwater - Water found beneath the Earth's surface in reservoirs called aquifers.

Hazardous waste - Waste that is potentially reactive, corrosive, flammable, toxic or explosive.

Heavy metals - Metals such as lead, mercury and arsenic that can be toxic in certain concentrations.

Incandescent lamps - Lamps that emit light as a result of an element or filament being heated.

Integrated waste management - The safe handling of municipal solid waste. This includes source reduction, recycling, composting, combustion and landfilling.

Landfill - A tract of land where waste is disposed of in a series of compacted layers and later covered with soil, compacted clay, plastic lining or a combination of these things.

Lead acid batteries - Batteries commonly found in cars and boats.

Natural resources  -Resources taken from the earth, such as minerals, petroleum, coal, wood and water.

Nitrogen oxides - Nitrogen oxides (NOx), is the generic term for a group of gases, all of which contain nitrogen and oxygen in varying amounts. Many of the nitrogen oxides are colorless and odorless. Nitrogen oxides form when fuel is burned at high temperatures, as in a combustion process. The primary manmade sources of NOx are motor vehicles, electric utilities and other industrial, commercial, and residential sources that burn fuels. NOx also can be formed naturally.

Passerine - An adjective describing something that relates to the largest order of birds, passeriformes, which includes more than half of all birds.

Pollutant - A substance in certain concentrations that is capable of degrading the environment's usefulness. Many such substances in diluted forms are not harmful to humans or to the environment.

Recyclable - Materials that can be collected, separated and processed for reuse as raw materials in the production of new products, such as glass, metal, wood, plastic, petroleum and coal combustion by-products.

Recycling - The process of separating, collecting and processing materials for reuse that otherwise might have been discarded.

Reuse - Using a product more than once. For example, a soda company refilling used bottles.

Source reduction - The design, manufacture, purchase and use of materials in ways that reduce the amount of waste. This includes reusing items, using only recommended amounts or reducing unneeded packaging.

Toxic - The ability of a substance to produce harmful effects on humans, other animals and/or the environment.