The word "strength" can mean many different things. An individual's physical strength is determined by two factors: the cross-sectional area of the muscle fibers recruited to generate force and the intensity of the recruitment. In the field of positive psychology the VIA Inventory of Strengths has been developed. This is a psychological assessment tool by which people can identify their character strengths and learn how to capitalize on them. Positive psychology is a relatively new field of academic study, and the first International Conference on Positive Psychology took place as recently as 2003. Its primary aim is to identify people's strengths and help them to grow, rather than looking at any illness. Its classification of strengths includes social intelligence, curiosity, bravery, creativity, honesty and humor to name just a few. The strength of a material is its ability to resist deformation. The strength of a component is usually based on the maximum load it can bear before failure becomes apparent. In this edition, however, we will see how walls or bridges can be strengthened to protect them against graffiti or illegal posters. Furthermore, the Mandira dam in India, which was designed and built between 1957 and 1959, has suffered severe structural damage due to natural wear and tear, requiring intensive repair and retrofitting. The products used to restore the dam's strength underwent a number of quality tests at the site, such as pot life, compressive strength, bond strength, shrinkage strength, abrasion testing, and tensile strength. In addition to looking at the all-important area of materia strength, we explore another crucial kind of strength – sustainability and how industries and companies learn to grown stronger from it.