The GreenTech revolution is reshaping the global landscape, offering innovative solutions to the pressing environmental challenges of our time. This chapter explores the concept of Green Technology (GreenTech), tracing its historical evolution and highlighting its key sectors and applications. GreenTech encompasses a wide array of technologies and practices aimed at reducing environmental impact, conserving natural resources, and promoting sustainability across various industries, including energy, transportation, agriculture, and waste management. Despite its transformative potential, the widespread adoption of GreenTech faces significant challenges, including technological barriers, financial constraints, regulatory complexities, and societal resistance. These obstacles, however, also present opportunities for innovation, market growth, and collaboration. The chapter examines these challenges and opportunities, emphasizing the role of technological advancements, emerging markets, and strategic partnerships in driving the GreenTech revolution forward.