Complex sentence: A boardwalk, in the conventional sense, is a wooden walkway for pedestrians and sometimes vehicles, often found along beaches, but they are also common as paths through wetlands, coastal dunes, and other sensitive environments.
Split into simpler sentences: A boardwalk, in the conventional sense, is a wooden walkway for pedestrians and sometimes, vehicles. Boardwalks are often found along beaches, but they are also common as paths through wetlands, coastal dunes, and other sensitive environments.