Greenhouse gas emissions are gases released into the atmosphere that trap heat from the sun, contributing to global warming. Common greenhouse gases include carbon dioxide, methane, and nitrous oxide. These gases come from various sources, such as burning fossil fuels for energy, agricultural practices, and waste decomposition. When the concentration of these gases increases, they create a "greenhouse effect," which leads to rising temperatures and climate change. This can result in severe weather events, rising sea levels, and disruptions to ecosystems. Reducing greenhouse gas emissions is crucial for protecting our planet and ensuring a sustainable future.