The chapter explores the effects of climate change on agricultural productivity, emphasizing the importance of developing genetically engineered crops to withstand environmental stresses such as drought, salinity, heat, and flooding. Using CRISPR-Cas systems, researchers have made significant strides in enhancing traits such as stress tolerance and yield improvements in crops like rice, maize, tomato, and soybean. This technology allows for precise genome editing, providing a tool for future-proofing crops in response to a growing global population and changing climate conditions. The chapter also delves into the ethical, social, and economic implications of using such technologies. It discusses the regulatory frameworks needed for safe application and highlights the need for public acceptance and international cooperation to make the technology accessible, particularly for smallholder farmers in developing regions. The advancement of nanoparticle-based delivery systems for CRISPR components, alongside the evolving role of prime editing, presents promising avenues for improving genome engineering efficiency. Additionally, it emphasizes the potential of these innovations to accelerate breeding programs, reducing the time it takes to develop climate-resilient crops. However, despite these advances, there are still significant technical and regulatory hurdles to overcome. Challenges remain in optimizing these systems for broad agricultural use while balancing concerns around off-target effects, intellectual property rights, and public resistance. The chapter stresses that global collaboration and a harmonized regulatory approach are essential for fully realizing the potential of CRISPR-Cas systems to address food security and environmental sustainability, particularly in the face of mounting climate pressures and growing demands on the agricultural sector.