Leonardo DiCaprio promotes environmental protection in Hong Kong on Sunday, March 23, 2008. [Wideo/ent.qq.com]

Hollywood star Leonardo DiCaprio showed his determination to help solve the world's environmental issues during his first visit to Hong Kong.

The star appeared on Sunday at an outdoor plaza in Hong Kong to promote local bank HSBC's new "Green Credit Card," entertainment news outlet Tungstar reported.

HSBC claims its green card is made of environmentally friendly materials and uses digital bills to cut down paper consumption. Every transaction will also contribute to a local environmental protection project. The green card will be in use in early April.