If you had to choose one cause to fight for, what would it be?
Karen Lee Ka-ki, 14, Carmel Secondary School
Some people think that wearing fur is a status symbol and a sign of luxury. But millions of innocent animals, including foxes, tigers, mink, otters and snakes, are unnecessarily and cruelly farmed and slaughtered every year because of the fashion world's hunger for animal skins.
The fur trade also involves the brutal trapping and killing of wildlife. According to a recent poll by Humane Society International, more than eight million animals are trapped yearly for fur. Many of them are kept in inhumane conditions and treated cruelly in fur farms.
Therefore, I would fight to end the abuse of animals that results from the use of fur in the fashion industry.
Fashion is not an excuse to harm animals. There is no need to wear real animal fur as there are perfectly good artificial alternatives. Fake fur is not as warm as real fur, but most of the time fur is worn as a fashion statement, not because of its practicality.
Some fashion designers have rejected fur as a working material for compassionate reasons, and this offers hope.
Banning of imports, exports and sales of fur should be enforced to protect all animals, as it is an urgent global issue.
I want to do my part to protect our beautiful wildlife and fight for a more humane world.
Melody Cheung Wing-kei, 15, St Paul's Secondary School
I would fight to save the earth from climate change. Due to the selfishness and shortsightedness of humans, the earth's environment and ecology have been damaged.
People always strive for economic development. They extract resources from nature, including oil and coal. But the natural habitats of animals are destroyed at the same time.
Also, many people live a luxurious lifestyle. They eat rare species, turn on air conditioners and invent hi-tech equipment to improve living standards. They ignore the damage done to endangered species, and the emission of greenhouse gases and other pollutants.
There are harsh consequences to all these actions - one of them is climate change. Global warming causes extreme weather conditions and the melting of polar ice.
There have been more frequent natural disasters in recent years, causing large numbers of casualties. This is significant evidence of human activities destroying the earth. Why don't we admit it?
I am not afraid to admit it is our fault and am eager to fight to protect the environment and the earth. I would start changing my habits to reduce the damage I am doing to the earth. I would minimise my use of electrical appliances, recycle my waste and not eat endangered animals and plants.
I would also urge people around me and around the world to change their 'polluting' lifestyle. I would demonstrate against the rich and criticise those who insist on maintaining their luxurious lifestyle. I am determined to fight for our only earth.