Category Archives: sustainability_a_z_terms

Dead Zone

A dead zone, another way to refer to the phenomenon of hypoxia, refers to an area in a body of water, such as a lake or ocean, in which there is no oxygen present and therefore no aerobic, or oxygen-requiring, life can exist in these regions. Learn More What Is a Dead Zone? – National Ocean Service NOAA    

» Read more

Hydroponics

Hydroponics is a method for growing plants in which roots are suspended in a nutrient solution consisting of water and fertilizers. An artificial medium, such as sand, gravel, perlite, peat moss, or sawdust, may or may not be used. Liquid hydroponic systems have no supporting medium for the plant’s roots, while aggregate systems have a solid medium of support. Hydroponic […]

» Read more

Waste to Energy

Energy recovery from waste, also known as Waste-to-Energy (WTE), is the generation of heat, electricity, or fuel, through various processes, such as combustion, anaerobic digestion, and gas recovery. Allentown recently canceled a 35-year contract drafted in 2012 with Delta Thermo Energy Inc. for the construction of a waste-to-energy facility on Little Lehigh Creek, however, the mayor cancelled it because of […]

» Read more

Urban Heat Islands

The term “urban heat island” refers to developed urban areas that are hotter than nearby rural areas. Some effects of this phenomenon include increased peak energy demand in the summertime, higher air conditioning costs, increased air pollution, more occurrences of heat-related illnesses, and compromised water quality. Learn More Heat Island Effect – EPA Urban Heat Island – National Geographic Urban […]

» Read more

Solar Power

Using efficient silicon crystals, solar photovoltaic (PV) panels generate electricity when struck by solar energy in the form of sunlight, which the Earth receives in abundance everyday. As light strikes a crystal, the electrons shared between silicon atoms become excited into a higher energy level, producing an electric current. New “thin film” panels require smaller silicon crystals and can be utilized […]

» Read more

Bottle Bill

A bottle bill, also known as a container deposit law, contains state dictated policies that establish refundable deposits on beer, soft drink and other beverage containers to incentivize people to recycle or reuse their bottles. Ten states and the territory of Guam currently have bottle bills. Pennsylvania does not. Learn More What Is a Bottle Bill? – Container Recycling Institute

» Read more

Ethanol

Ethanol, an alcohol made from feed stocks (like corn), sugar case, or cellulosic material, is often combined with gasoline for use in internal combustion engines to increase efficiency. It falls into the broader category of biofuels. Learn More Ethanol Fuel Basic – US Department of Energy

» Read more

Ethical Consumerism

Ethical consumerism utilizes small, everyday purchases to show companies and corporations the practices of which the consumer both approves and disapproves. By understanding either the ethical or unethical practices a company assumes, consumers can choose to either support or undermine justice, creating a small change that can grow into a huge effect for the global society. Learn more

» Read more

Eutrophication

Eutrophication is a process whereby a body of water acquires a high concentration of nutrients, particularly phosphates and nitrates, causing an excessive growth of algae. The algae die and decompose, creating high levels of organic matter and depleting the water of available oxygen. It can be caused naturally, as aquatic ecosystems are not static, or human generated, through inorganic plant […]

» Read more
1 2 3 4