Hong Kong is set to embark on its most expensive infrastructure project ever. The city plans to build a third airport runway. The cost will be high. The project’s critics say the third runway isn’t necessary and complain the other two runways are underutilized. CCTV’s Cathy Yang filed this report from Hong Kong.

Hong Kong's $18 billion airport runway faces scrutiny

Hong Kong is set to embark on its most expensive infrastructure project ever. The city plans to build a third airport runway. The cost will be high. The project's critics say the third runway isn't necessary and complain the other two runways are underutilized. CCTV's Cathy Yang filed this report from Hong Kong.

Highlights:

• The planned airport expansion is set to be the most expensive infrastructure project ever in Hong Kong, at more than $18 billion.
• Environmentalists insist that building a third runway would deal a big blow to marine wildlife in the surrounding area.