On the chief executive's stay in a hotel presidential suite during an official visit to Brazil: Kyle Bryce-Borthwick - He's the leader of Hong Kong. I'm sorry but he's not another civil servant ... presidents and PMs stay in presidential suites and that's expected. The chief executive is entitled to the same treatment. Ed Yee - Using taxpayers' money to live it up is not acceptable. He sure learns fast from the Chinese officials. Wondering what the next one would do. It sure appears that the chief executive for HK is getting worse and worse. On Lady Gaga's arrival in Hong Kong for sell-out concerts: Tatt Tam: SCMP, we are all looking forward to your updates to see if those so-called 'sold-out' concerts will really be sold out. Keith McNab - Thanks Lady Gaga for the pollution from your private jet, the ultimate in selfish behaviour! Wendy Yap - Who is she? Philip Ho - She is such a poser. On KMB's plans for its first electric bus route: Bjorn Berg - Electric buses don't fully eliminate carbon emissions. At best, they reduce local emissions while displacing the majority of emissions. Thus the city environment and air quality should improve significantly if electric buses were to be used on a large scale, but people shouldn't forget that in some other place the opposite may be true (unless the electricity is sourced from renewables but I assume most of it will come from coal-fired power plants). Alan Seigrist - Thanks KMB for taking leadership on this! Albert Lo - How frequently will the buses need charging? James Banbury - How about a modern tram route on Nathan Road? Jax Matias - Electricity comes from coal-powered plants.