The Aviation Environmental Design Tool (AEDT) is a software application developed by the Federal Aviation Administration (FAA) in collaboration with other aviation stakeholders, including aircraft and engine manufacturers, airports, and regulatory agencies.

AEDT is a comprehensive modeling tool designed to assess the environmental impacts of aircraft operations, including noise, air quality, and greenhouse gas emissions. The tool uses a combination of aircraft performance models, emissions models, and environmental models to estimate the environmental effects of different aircraft operations, such as takeoff, landing, and cruise.

The primary purposes of AEDT are:

1. Environmental impact assessment: To evaluate the environmental effects of proposed aircraft operations, such as new airport developments or changes to air traffic control procedures.
2. Aircraft design and optimization: To help aircraft manufacturers design and optimize their aircraft to minimize environmental impacts.
3. Regulatory compliance: To support regulatory agencies in developing and enforcing environmental standards for aviation.
4. Research and development: To facilitate research into new technologies and strategies for reducing aviation's environmental footprint.

AEDT can be used to analyze various aspects of aircraft operations, including:

• Noise contours and sound levels
• Emissions of pollutants, such as nitrogen oxides (NOx), particulate matter (PM), and carbon monoxide (CO)
• Greenhouse gas emissions, including carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O)
• Fuel burn and energy consumption

By using AEDT, stakeholders in the aviation industry can work together to develop more environmentally friendly aircraft, operations, and infrastructure, ultimately reducing the environmental impacts of aviation and promoting sustainable aviation practices.