haha..
i went online yesterday and found out abt the CO2 thing also.. apparently, ruo ling n i went to the same websites.. haha.. yahoo search rite..
oh yes..
ladies n gentlemen, anybody gamed to take ten hrs of hike, or would you all prefer 5hrs?
let's be a bit gungho.. 5hrs < time < 10 hrs..
choose ur fav time period..