This book introduces the background of carbon neutrality and the objectives that are set for China and other regions. It clarifies the key technical issues in implementing carbon neutrality at different levels, focuses on the analysis and study of the paths for implementing carbon neutrality at the regional, organizational, and project/activity levels, and looks into the advanced carbon emission reduction technologies in major emission areas and the application of carbon emission removal technologies in carbon neutrality. It can help with effective implementation of carbon neutrality in different industries and provide beneficial early-stage analysis and scientific guidance for achieving carbon neutrality on schedule at regional level.