Surrounded by smog, Pakistani workers carry bricks to the zigzag kiln, a new technology pushed by the government to tackle pollution by reducing heat loss, but which "only a few know how to use", according to brick worker Sajid Ali Shah. As Lahore, Pakistan's second largest city, hit record pollution levels this month, brick kiln owners and workers complained that the authorities had failed to provide training on how to use the new technology, which is financially out of reach for many. IMAGES AND SOUNDBITES