Concrete is the most used construction material on Earth, almost 10,000 million tons/year. In this chapter the environmental impacts of Portland cement concrete are described. The importance of pozzolans as Portland cement replacement additions and its role in increasing concrete durability is discussed. This chapter covers the use of non reactive wastes as aggregate replacement. It also covers the importance of organic polymers in concrete durability. It addresses the case of self-sensing concretes as a way to assess its own damage avoiding structure failure. Finally, eco-friendly environmental binders alternative to Portland cement such as sulfo-aluminate cement, magnesium phosphate cement and alkali-activated binders are discussed.