28 July 2016, Renew Economy, Energy minister right on renewables and climate, wrong on gas. The new energy and resources minister Josh Frydenberg has indicated a significant shift in energy policy for the Coalition. He correctly notes that renewables alone are not to blame for recent high electricity prices in South Australia. Unlike the new federal minister for resources, Matthew Canavan, Mr Frydenberg accepts mainstream climate science and the fact that humanities actions are driving global warming. He says that we need a diversified energy mix, that the national Renewable Energy Target (RET) is ‘set in stone’ – which will stabilise the investment environment for renewables, and has ruled out further tax payer subsidies for fossil fuel generation. These moves are all to be welcomed. And while Frydenberg is a long standing supporter of nuclear power, he acknowledges that our country should not move towards domestic use of uranium unless there is ‘bipartisan support’. It is difficult to imagine the majority of Australians would ever support a domestic nuclear reactor. However, Frydenberg is profoundly out of step with the community in calling for an end to the current moratoriums on unconventional gas. In Victoria, 73 regional communities have declared themselves ‘gasfield free’. While these declarations have no legal standing, they indicate deep seated opposition to fracking and drilling by communities. Most of the declared areas are in Coalition held seats and advocacy by the federal minister for state governments to lift the ban will damage the Coalition’s credibility in its core consistency. Further, with a well managed national electricity grid and diversity of renewable sources plus enhanced use of storage technologies (including existing hydro dams) gas is not needed as back up for wind and solar. The argument that gas is a bridging and back-up fuel is out dated. We now have 21st century renewable technology which can meet our electricity needs. Read More here
Yearly Archives: 2016
26 July 2016, The Guardian, Disasters linked to climate can increase risk of armed conflict. Research found that 23% of violent clashes in ethnically divided places were connected to climate disasters. Climate-related disasters increase the risk of armed conflicts, according to research that shows a quarter of the violent struggles in ethnically divided countries were preceded by extreme weather.The role of severe heatwaves, floods and storms in increasing the risk of wars has been controversial, particularly in relation to the long drought in Syria. But the new work reveals a strong link in places where the population is already fractured along ethnic lines. Previous work has shown a correlation between climate disasters and fighting but the new analysis shows the disasters precede the conflict, suggesting a causal link. Experts have warned that an increase in natural disasters due to global warming is a “threat multiplier” for armed violence. The scientists behind the new research say it could be used to predict where future violence might flare, allowing preventative measures to be taken. “Armed conflicts are among the biggest threats to people, killing some and forcing others to leave their home and maybe flee to faraway countries,” said Prof John Schellnhuber, director of the Potsdam Institute for Climate Impact Research in Germany and one of the research team. The combination of climate disasters and ethnic tensions make an “explosive mixture,” he said. Read More here
25 July 2016, IOP SCience: Readily implementable techniques can cut annual CO2 emissions from the production of concrete by over 20%. Due to its prevalence in modern infrastructure, concrete is experiencing the most rapid increase in consumption among globally common structural materials; however, the production of concrete results in approximately 8.6% of all anthropogenic CO2 emissions. Many methods have been developed to reduce the greenhouse gas emissions associated with the production of concrete. These methods range from the replacement of inefficient manufacturing equipment to alternative binders and the use of breakthrough technologies; nevertheless, many of these methods have barriers to implementation. In this research, we examine the extent to which the increased use of several currently implemented methods can reduce the greenhouse gas emissions in concrete material production without requiring new technologies, changes in production, or novel material use. This research shows that, through increased use of common supplementary cementitious materials, appropriate selection of proportions for cement replacement, and increased concrete design age, 24% of greenhouse gas emissions from global concrete production or 650 million tonnes (Mt) CO2-eq can be eliminated annually. Research Paper: Read More here
20 July 2016, CSIRO Blog, Supersonic magnesium. It’s used to make our smartphones and cars, and it makes our fireworks go off with a brilliant bang. It’s the third most commonly used structural metal and comprises 2% of Earth’s crust. We are of course talking about magnificent magnesium. Why do we think it’s so magnificent? Well, when magnesium is mixed with other metals it makes stable, super-strong alloys. Not only are these alloys used in our mobile phones and laptops, they are also highly sought after by car manufacturers who are turning to the metal as a solution for making lightweight, low-emission vehicles. Australia is sitting in the driver’s seat to deliver new, improved, ‘supersonic’ magnesium metal and take advantage of our vast untapped reserves of magnesite. So we’ve decided to take the wheel and develop an innovative technology, known as MagSonic, which produces magnesium using up to 80 per cent less energy and up to 60 per cent less carbon dioxide emissions than traditional processes. The process involves heating magnesia (magnesium oxide) with carbon to extreme temperatures to produce magnesium vapour and carbon monoxide. The gases are then passed through a supersonic nozzle – similar to a rocket engine – at four times the speed of sound. This cools the gases in milliseconds, condensing and solidifying the magnesium vapour to magnesium metal. Read More here