Our student, Tang Cheuk Yin, was chosen to represent HKSAR to join two international science competitions (ISWEEEP and Genius Olympiadin) in May and June, 2013 in the US. He was awarded silver medals for the project named ‘Biogas’. Biogas is methane released when bread and other putrescibles are toasted. With iron ore, biogas could extract iron in refineries. Because of this, methane, a potent greenhouse gas, would no longer aggravate global warming. Instead, it would provide an environmental-friendly alternative for steel manufacturing industry, which is one of the largest greenhouse emitters. We hope that “Biogas” would arouse public awareness of environment protection and sustainability.