EBEYE, MARSHALL ISLANDS — Linber Anej waded out in low tide to haul concrete chunks and metal scraps to shore and rebuild the makeshift sea wall in front of his home. The temporary barrier is no match for the rising seas that regularly flood the shacks and muddy streets with saltwater and raw sewage

Light as a source of energy is an expression of the existence and life. Light can be defined as that agent, force, or action in nature by the operation of which upon the organs of sight, objects are rendered visible or luminous. Sources of light include the sun, a star, a candle or a lighthouse. Lig...