The book explains "green" or "clean" technologies, and refers to the growth of new technologies aimed at protecting, monitoring or reducing the negative effect of technologies on the ecosystem and resource consumption. It also discusses how technology profoundly affects society, the economy, and the environment. It has caused various environmental and social problems, however it is also essential to address environmental degradation, food shortages, climate change, waste management and different other persistent global challenges. The book describes how human society quickly responds to the ever-evolving challenges, which largely depends on the speed and scale through which advanced technologies replace inferior technologies in various global environments.