How do environmental factors, such as wind, seismic activity, temperature variations, and corrosive agents, impact the durability and service life of concrete structures? Describe the mechanisms by which these external forces degrade concrete over time and compromise its mechanical properties. What preventive measures and material enhancements can engineers implement to mitigate the effects of environmental deterioration and extend the lifespan of concrete infrastructure? Discuss the importance of regular maintenance, repair, and rehabilitation strategies in preserving concrete structures for long$-$term use.