Leadership in Energy and Environmental Design (LEED) LEED-Green-Associate Release Date

Biomass is a renewable energy source that can be used to produce electricity from organic plant and waste material. It is considered green power by the U.S. EPA because it provides environmental benefits and reduces greenhouse gas emissions12.

Methane is a potent greenhouse gas that contributes to global warming and climate change. It is produced when organic waste decomposes anaerobically (without oxygen) in landfills1. Construction and demolition waste, which accounts for about a third of all solid waste generated in the world2, often contains a large amount of organic materials, such as wood, paper, and food waste1. Therefore, disposal of solid waste from building construction and operations in landfills has a substantial effect on methane emissions13. Incineration of solid waste also produces greenhouse gases, such as carbon dioxide, carbon monoxide, and hydrochloric acid, but at lower levels than landfilling45. Volatile organic compounds (VOCs) are not greenhouse gases, but they can react with other pollutants to form ozone, which is a greenhouse gas and a health hazard4.

Recycling is a strategy that can be used to reduce the amount of construction waste that is sent to landfills or incinerators. Recycling involves collecting, sorting, processing, and reusing or selling materials that would otherwise be discarded as waste. Recycling can save natural resources, reduce greenhouse gas emissions, create jobs, and lowerdisposal costs1 . References: LEED v4 Green Associate Candidate Handbook1, EPA’s Recycling Basics

Closed systems are systems that promote the conservation of materials and resources by linking elements in order to form relationships with their function. Closed systems aim to minimize waste, energy loss, and environmental impact by reusing, recycling, or regenerating materials within the system boundaries. Closed systems can be inspired by natural ecosystems, where waste from one process becomes food for another process. An example of a closed system is a building that collects rainwater for irrigation, uses solar panels for electricity, composts organic waste forfertilizer, and recycles greywater for flushing toilets1 . References: LEED v4 Green Associate Candidate Handbook1, Biomimicry Institute’s What is Biomimicry?