This document provides an introduction to key environmental concepts and terms. It begins with a list of buzzwords related to the environment, such as air pollution, carbon dioxide emissions, climate change, fossil fuels, and renewable energy. It then discusses topics like global warming, sea level rise, glacier melting, anthropogenic activities, the green economy, ozone depletion, safe drinking water, population growth, food security, extreme weather events, climate change adaptations, genetically modified organisms, carbon footprint, water footprint, solid waste management, and the United Nations' Millennium Development Goals. The goal is to familiarize readers with important environmental issues and sustainability concepts.