How would you persuade a group of aliens not to invade earth?

Balwinder Singh, 15, Delia Memorial School (Hip Wo)

I would take them around the world to see how happy people are. I would give them a big gift and tell them that humans would really like to be friends with them. A large delegation could greet the aliens when they come to earth, helping to change their minds.

Alice Leung, 16, Ho Fung College

I would take the aliens on a trip around the world. I would show them the Amazon rainforest, the pyramids, the Great Wall and the Taj Mahal. Last but not least, I would take them to a concert. If they invade the earth, I would tell them all of these fabulous things would be gone. Would they want that? Definitely not.

Aaron De Silva, 18, ELCHK Lutheran Secondary School

I would use the environmental problems we are facing, such as pollution and global warming, to persuade aliens not to invade our planet. I would tell them how difficult life is on our 'dirty' planet. The aliens would realise that it would be better to stay where they are since earth is well on the way to destroying itself.