Two of the biggest sports events of the year, the Commonwealth games in Birmingham and the FIFA world cup in Qatar have pledged to be the most sustainable and green sporting events to date. Both have made bold statements 'the first sustainable commonwealth games' and the ‘first carbon-neutral FIFA World Cup'. Qasa Alom finds out if they can really deliver and just how sustainable and green these global sports events will be. Starting off with his home city of Birmingham Qasa discovers some of the changes taking place, from stadium infrastructure to transport and offsetting. Will these commonwealth games be the first games with a carbon neutral legacy and set a benchmark for future games? The sporting world is starting to rise to the challenge, and it must, already major International tournaments are being adversely affected by a warming climate. At the FIFA World Cup in Qatar teams will be playing in artificially cooled stadiums with games held, controversially, in the cooler month of November and December. Qasa finds out if future world class sports events will require radical solutions in a changing climate, and what sporting events can do to curb their own emissions. Producers for BBC Audio in Bristol: Perminder Khatkar and Helen Lennard