The article discusses the efficiency and improvements made in Tesla turbines, with a focus on reducing costs and environmental impact. The use of bladeless turbines reduces maintenance costs by a greater percentage, while elevating turbines to access flowing wind and installing generators at the bottom of posts improves efficiency. Additionally, using coolants in gas turbine engines reduces pollution and conserves the environment. The article also highlights the importance of considering new materials and technologies to further improve the efficiency of Tesla turbines.