For more than a century, countries have raced to build the world’s tallest buildings with concrete and steel. Now, a quiet contest in constructing tall wooden buildings, from Amsterdam to Tokyo, underlines growing environmental concerns over concrete.  With rapid advances in engineered wood, and authorities relaxing building codes, wooden structures are sprouting across Europe, Canada, the United States, and in the Asia Pacific region.  At 73 metres (240 ft), Amsterdam’s Haut building is said to be the world’s tallest wooden residential tower.  Vancouver plans a 40-storey building it says will ...