| A | B |
| ecological footprint | A measurement of human demands on the earth’s ecosystems |
| ecology | The interrelationship between organisms and their communities |
| ecosystems | An ecological community, together with its surroundings, functioning as a unit. |
| environment | all living and nonliving things that occur naturally on or around planet Earth |
| finite resource | A natural resource with a limited supply, such as fossil fuels and minerals |
| fossil fuels | Nonrenewable energy resources, such as coal, oil, and natural gas, that take millions of years to form |
| natural resource | Naturally occurring substances that are considered valuable to humans (though this value cannot be measured in human terms) in their unmodified, or natural, form. |
| nonrenewable resources | Resources, such as fossil fuels and minerals, that cannot be reproduced and can therefore be used up |
| renewable energy | Energy generated from resources, such as sunlight, wind, geothermal heat, rain, and tides that are replenished naturally |
| renewable resource | A natural substance capable of being replaced through natural ecological cycles. |
| resource | Also referred to as natural resource, this is something found in nature that we use or need, such as trees, water, sunlight, and coal |
| sustainability | A code word for a variety of emerging standards, expectations, and goals that encourage corporations, organizations, and society at large to address the adverse social and environmental effects of commerce |
| sustainable development | According to the United Nations, it is “development that meets the needs of the present without compromising the ability of future generations to meet their own needs.” The term also implies the methods by which wealth and resources are transferred from the “developed” world to the “developing” world. |
| sustainable practice | The implementation of procedures and regulations that reflect the principles of sustainability (i.e., incorporate social, environmental, and financial value for an organization |
| sustainable tourism | Tourist activities that are designed to provide an enjoyable and educational experience for the traveler while also being beneficial to the local community and demonstrating responsible conservation practices. |
| tourism | Travel for recreational, leisure, and educational purposes |
| tourist | A person who travels and stays in places outside his or her usual home environment. |