Modern high rise buildings are often viewed as iconic statements of a city's wealth and status. The rivalry between nations to have the tallest building is ongoing but a new trend is emerging – the challenge to build the greenest skyscraper. Claire Symes reports.
The highest building in the world, the Burj Dubai, is currently under construction in the United Arab Emirates. Murray Pollok reports on the complicated arrangement of PEGA construction hoists being used to transport the project's 4000 workers.