Conversion EfficiencyThe amount of available sunlight that a solar panel converts to electricity is known as conversion efficiency. This can exceed 20% for modern solar panels.
Energy EfficiencyThe amount of energy used by a facility, product, service, process or activity relative to its output. For example, the luminous efficiency of a light source is a measure of how well a light source converts energy into visible light. The luminous efficiency of an LED light bulb can exceed 20%.
Energy IntensityAnother term for energy efficiency measured in terms of value produced. For example, energy per passenger mile is a means for comparing the energy consumption of transport. This can be measured in kilojoules per kilometre.
Design EfficiencyDesign efficiency is achieving the desired level of quality of a design with the minimum amount of resources. For example, a safe, luxurious car that weights 4000 kilograms versus an equivalent design that weights 5800 kilograms. Generally speaking, design efficiency improves with time in a large scale trend known as dematerialization.
Building EfficiencyThe energy efficiency of a building. For example, smart glass that adapts to available sunlight to help achieve lighting, heating and cooling settings of a room such that they reduce electricity consumption.
ProductivityThe efficiency of labor is known as productivity. This can be measured as the amount of value produced in an hour of work. For example, a farmer who improves their efficiency to $50/hour by installing an automated irrigation system.
Crop YieldCrop yield is the amount of a crop produced relative to land used measured with kilograms per hectare or bushels per acre. This is generally increased with intensive farming techniques that may use land effectively but use a large amount of inputs such as water, chemicals and capital equipment.
Land FootprintLand footprint is similar to crop yield but can be applied to any industry. For example, the land footprint of a highway could be measured in acres per billion passenger miles and compared to a competing type of infrastructure such as a high speed rail line.
Cost EfficiencyCost efficiency is the cost per output of something. This is occasionally a reasonable approximation for resource efficiency as costs often map to resource consumption. For example, the dollars per mile may be a reasonable approximation for the total resources consumed by travel if you include all costs such as infrastructure costs and the value of land consumed by infrastructure.
Carbon FootprintThe amount of carbon dioxide and other carbon compounds emitted by a facility, process, product, service, activity or entity. For example, the amount of carbon dioxide emitted per square foot of construction.
Water FootprintThe amount of water consumed by an output such as a ton of agricultural product.
ExternalitiesExternalities, or economic bads, are negative results of economic activity such as chemicals and gases released into the environment by a farm, ship, factory or vehicle. For example, kilograms of agricultural chemicals used per hectare of farmland.
|Overview: Resource Efficiency|
The amount of value that you realize from a unit of a resource such as power, water, materials, land and labor.