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In marine environments, phytoplankton grow quickly and are almost immediately grazed; this is evidenced by that fact that phytoplankton biomass can turn over 100–300 times per year. Terrestrial plants, on the other hand, grow slowly and expend much of the energy derived from primary production on their own respiration, resulting in much ...
(pl.) aboiteaux A sluice or conduit built beneath a coastal dike, with a hinged gate or a one-way valve that closes during high tide, preventing salt water from flowing into the sluice and flooding the land behind the dike, but remains open during low tide, allowing fresh water precipitation and irrigation runoff to drain from the land into the sea; or a method of land reclamation which relies ...
Energy efficiency—using less energy to deliver the same goods or services, or delivering comparable services with less goods—is a cornerstone of many sustainable energy strategies. [ 36 ] [ 37 ] The International Energy Agency (IEA) has estimated that increasing energy efficiency could achieve 40% of greenhouse gas emission reductions ...
It is estimated that the energy yield presently of bioenergy crops converted via silage to methane is about 2 GWh/km 2 (1.8 × 10 10 BTU/sq mi) annually. Small mixed cropping enterprises with animals can use a portion of their acreage to grow and convert energy crops and sustain the entire farm's energy requirements with about one-fifth of the ...
Modern power management systems also reduce energy usage by idle appliances by turning them off or putting them into a low-energy mode after a certain time. Many countries identify energy-efficient appliances using energy input labeling. [25] The impact of energy efficiency on peak demand depends on when the appliance is used.
Clean Edge, a clean technology research firm, describes clean technology "a diverse range of products, services, and processes that harness renewable materials and energy sources, dramatically reduce the use of natural resources, and cut or eliminate emissions and wastes." Clean Edge notes that, "Clean technologies are competitive with, if not ...
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energy management - A program of well-planned actions aimed at reducing energy use, recurrent energy costs, and detrimental greenhouse gas emissions. energy recovery – the productive extraction of energy, usually electricity or heat, from waste or materials that would otherwise have gone to landfill.