This book discusses how molecular biology and genetic engineering can be harnessed to develop crops that are resistant to climate-induced stresses such as drought, high temperatures, and soil salinity. It emphasizes strategies like genetic modifications, molecular markers, and biotechnology that can improve crop yields and resilience under adverse environmental conditions. By integrating knowledge from plant biology, biotechnology, and climate science, it aims to provide a comprehensive understanding of the tools available for ensuring food security in the face of global climate change.