Greenhouse Gases - Gaseous components of the atmosphere that absorb and emit radiation at specific wavelengths within the spectrum of infrared radiation emitted by the Earth's surface, atmosphere and clouds. Water vapor (H2O), carbon dioxide (CO2), nitrous oxide (N2O), methane (CH4) and ozone (O3) are the main greenhouse gases in the Earth's atmosphere. There are also man-made greenhouse gases in the atmosphere, such as halocarbons and other chlorine and bromine-containing substances. https://www.greenfacts.org/glossary/ghi/greenhouse-gas.htm

Zero Waste - Conservation of all resources through the responsible production, consumption, reuse and recovery of products, packaging and materials without combustion or discharge into soil, water or air in a way that threatens the environment or human health. https://zerowasteeurope.eu/about/about-zero-waste/

Sustainability - It means meeting the needs of today without compromising the ability of future generations to meet their own needs. In addition to natural resources, social and economic resources are also needed. Sustainability is not just environmentalism. https://www.mcgill.ca/sustainability/files/sustainability/what-is-sustainability.pdf