Chemically inert gas is mainly used to fill hot air and party balloons. Balloons filled with it float upwards and this phenomenon is achieved as helium gas is less dense than air Chemically inert In chemistry, the term chemically inert is used to describe a substance that is not chemically reactive. Most Group 8 or 18 elements that appear in the last column of the periodic table (Helium, Neon, Argon, Krypton, Xenon and Radon) are classified as inert (or unreactive). These elements are stable in their naturally occurring form (gaseous form) and they are called inert gases. The noble gases were previously
Phase-out of incandescent light bulbs products. The new minimum standard efficiency level is 15 lumens per watt (lm/W). From November 2008, no non-compliant lighting (including some incandescent globes) were imported into Australia, and from November 2009, the retail sale of non-compliant lighting was banned. According to the current proposal, all regular light bulbs and some other kinds of light bulbs sold from October 2009 have to meet the new minimum energy performance standards. Incandescent light bulbs that meet the new standards, for example high-efficiency halogen bulbs, continue to be available. It is estimated that greenhouse gas emissions will be cut by 800,000 tonnes (Australia's current