By SUMAN NAISHADHAM
WASHINGTON (AP) — Qatar’s World Cup is ending on Sunday, but the climate pledges that were central to the gas-rich Gulf nation’s successful bid to host the event are staying in the world of mega sporting events. Scientists, environmental advocates and other experts say that sporting events such as the World Cup and the Olympics have grown to such a scale that efforts to make them more sustainable need to go far beyond Qatar’s efforts. The main problems are the buildout of stadiums and roads, and air travel for fans. One group, the International Olympic Committee, is considering shifting the Winter Olympics to a fixed pool of qualified host countries that already have the infrastructure.