Green Glossary – H
- Hair Booms
- See Oil Spill Hair Booms.
- Hair Mats
- See Oil Spill Hair Booms.
- Halogen
- A type of incandescent lamp with higher energy-efficiency than standard ones.
- Hammer Mill
- A shredding machine that can be used for various materials and purposes, such as garden waste for composting, garbage disposal, shredding paper and grinding shipping pallets for mulch.
- Hazardous Air Pollutants
- A group of air pollutants classified under the US Clean Air Act as dangerous to human health and detrimental to the environment.
- Hazardous Chemical
- Any manmade substance that poses a physical danger or health hazard to plants, animals and humans.
- Hazardous Landfill
- An area that has been excavated or engineered for depositing hazardous waste.
- Hazardous Ranking System or HRS
- The primary assessment tool used by the US Environmental Protection Agency (EPA) to evaluate health and environmental risks posed by abandoned or uncontrolled hazardous waste sites.
- Hazardous Waste
- Garbage that contains dangerous substances or potentially dangerous materials are classified as hazardous waste.
- Heat Capture Technology
- Any form of technology or system that traps "wasted" excess heat from gas turbines so it may be used as consumable heat.
- Heat Compression
- A type of recycling process, heat compression takes unsorted, clean discarded plastic and loads them into large rotating drums that apply heat and mixes the waste converting them into new plastic material.
- Hexanone
- Also known as 2-Hexanone, methyl n-butyl ketone, MBK, or propyl acetone, it is a clear, colorless liquid with a sharp odor. It was used in the past in paint and paint thinner, to make other chemical substances, and to dissolve oils and waxes. It is no longer made or used in the United States because it has harmful health effects.
- Hopenhagen
- Hopenhagen is a movement to create awareness and rally global support for the 2009 Copenhagen Agreement on Climate Change.
- Household Hazards
- Dangerous substances or conditions in human homes that arise from a wide variety of sources.
- Hybrid Car
- A hybrid car uses two power sources to move itself -- an internal combustion engine like one used in regular gas-powered cars and, in addition, at least one electric-powered motor.
- Hydroelectric Power
- Hydroelectric power is produced by using the push of falling water to turn turbines that generate electricity.
- Hydrofluorocarbons or HFCs
- Hydrofluorocarbons (HFCs) do not contain ozone-destroying chlorine or bromine atoms and are therefore used as substitutes for ozone-depleting compounds such as chlorofluorocarbons (CFCs) in such uses as refrigeration, air conditioning, and the manufacture of insulating foams.
- Hydrogen Fuel Cells
- An alternative power source for engines that can replace carbon-based oil fuels.
- Hydrology
- Hydrology is the science of the circulation and distribution of water from the moment it falls as rain until it is returned to the atmosphere by evaporation or transpiration.
- Hydronic Heating
- An environmentally-friendly way of heating indoor spaces using water as a heat transfer mechanism. The Hydronic Heating Association states that not only is water the "ultimate transfer medium" but can also be much better for air quality.
