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FORUM Toxic culture Age's exposure to 3M and the toxic PFOS chemicals now found in blood samples around the world is spectacular . How come the Australian government bans this class of chemicals and at the same time claims there is “no evidence of human disease or other clinically significant harm from PFAS exposure”? I had to reflect on personal health issues that have no family history, and I now know that just as asbestos killed my father and millions of people from smoking-related cancers, there are now PFAS chemicals in society. Ross Kroger, Barwon Head of Science Ethics Teaching The public should rightfully be outraged about toxic chemicals lingering in our bodies forever, but scientists won't be. We knew this and were embarrassed when it hit the front page. This year, Victorian schools have a new high school chemistry curriculum that encourages teachers to include ethical, social and economic aspects of the chemistry they teach, including use of forever chemicals. Believe it for a moment; Students undertaking this curriculum will have the skills and expertise needed to ensure this situation does not happen again. But this belief is based on providing quality professional development to teachers on how to implement it. Seamus Delaney, president of the Association for Chemistry Education Note the gaps On Thursday the prime minister announced that the first Metro Tunnel station in Arden is almost complete. It is a truly striking building. Prime Minister Jacinta Allan claimed in the press release that "Arden is a central and connected region". Unfortunately, for now it is neither central nor connected, and is the only one of the five new Metro Tunnel stations that does not have trams or other public transport next to it. Train passengers arriving at Arden will be stunned find that the only way reach other destinations is walk a short distance North Melbourne station or take the trams on Abbotsford Street. These expansions have been planned for many years, but this is yet another example the government's failure to prioritize numerous much-needed public transport improvements in favor of a handful hugely expensive "Big Construction" projects. John Hearsch, Heathcote Junction Until the early 1970s the CBD had only two stations Flinders Street and Spencer Street. Later the City Loop was built. Have you ever heard someone ask if it's worth the cost? Can you imagine the city developing without it? The same will be said about the Commuter Rail Loop 50 years later. The radial train network was launched last century as necessary infrastructure for the city of future, and it has served us extremely well. However, this is not enough for growing metropolis because the lines are getting longer and gaps between them are widening. Buses are not the solution and never will be. The Suburban Rail Loop will need to be built at some stage if Melbourne is to remain a liveable city. Connecting radial rail lines to intercit
