Author Archives: hmcadmin

PLEA Network

18 August 2015, The Conversation, The government vs the environment: lawfare in Australia. A key feature of authoritarianism is that the government is above the law – it is not accountable to the people for its actions. In contrast, under a democratic system, the rule of law means that the government is constrained by law and can be held accountable by the people. This is particularly pertinent to the move by Attorney-General George Brandis to restrict green groups from challenging major developments under federal law, a direct response from this month’s successful appealagainst the approval of the controversial Carmichael coal mine, being developed by the Adani Group, on environmental grounds.Brandis plans to repeal section 487(2) of the Environmental Protection and Biodiversity Act and “return (it) to the common law”. His actions follow comments by Prime Minister Tony Abbott and Trade Minister Andrew Robb. Read More here

 

PLEA Network

18 August 2015, Atmospheric Chemistry and Physics, Abstract. The injection of sulfur dioxide (SO2) into the stratosphere to form an artificial stratospheric aerosol layer is discussed as an option for solar radiation management. The related reduction of radiative forcing depends upon the injected amount of sulfur dioxide, but aerosol model studies indicate a decrease in forcing efficiency with increasing injection rate. None of these studies, however, consider injection rates greater than 20 Tg(S) yr−1. But this would be necessary to counteract the strong anthropogenic forcing expected if “business as usual” emission conditions continue throughout this century. To understand the effects of the injection of larger amounts of SO2, we have calculated the effects of SO2 injections up to 100 Tg(S) yr−1. We estimate the reliability of our results through consideration of various injection strategies and from comparison with results obtained from other models. Our calculations show that the efficiency of such a geoengineering method, expressed as the ratio between sulfate aerosol forcing and injection rate, decays exponentially. This result implies that the sulfate solar radiation management strategy required to keep temperatures constant at that anticipated for 2020, while maintaining business as usual conditions, would require atmospheric injections of approximately 45 Tg(S) yr−1 (±15 % or 7 Tg(S) yr−1) at a height corresponding to 60 hPa. This emission is equivalent to 5 to 7 times the Mt. Pinatubo eruption each year. Read More here

PLEA Network

17 August, Climate News Network, Andes’ migrating trees are moving towards extinction. Highland tree species in the Andes are decreasing as global warming caused by greenhouse gas emissions forces lowland varieties to move upwards into cooler climes. Scientists have known for years that, in a warming world, many living things try to move uphill to seek survival where the air is cooler. But new research provides a dire warning of the risks for those unable to move fast enough. Unlike animals, trees and other sorts of vegetation cannot move quickly to escape the heat. And for some of them, it seems, there is no survival option available. They simply die. A study published in the Proceedings of the National Academy of Sciences reports that the number of highland tree species in the Andes mountains of South America is decreasing as lowland trees move up the slope to avoid the rising temperatures and changing rainfall patterns. The results suggest that tropical tree species in the region are at risk of extinction because of the intensification of warming, caused by emissions of greenhouse gases from human activities. Can’t escape. “The effects of climate change are everywhere – you can’t escape it,” says Kenneth J. Feeley, a researcher in the Department of Biological Sciences and International Centre for Tropical Botany at Florida International University. “Some people hold the notion that the Amazon is an isolated and pristine ecosystem, immune to disturbances. We need to change our mindset and open our eyes to the fact that, even in the middle of the Amazon or the remote Andes mountains, species are at risk. Read More here

PLEA Network

17 August 2015, Resilience, Moral Discomfort, Privilege, and the Politics of Air-Conditioning…..Consider the cultural and historical perspective. Of course you could survive without air-conditioning, just as your grandparents and great-grandparents did and just as most people living in far hotter parts of Africa, South America, and Asia do.  At least a billion people of the world, mainly women, wash clothes exclusively by hand, and in climates much hotter than ours.  Most people still don’t own cars, but manage somehow nonetheless.  We often pity them but without really understanding their lives, supposing that we are the only people with happy and fulfilling lives.  Humans are far more adaptable and resilient than we are led to believe, and find joy and meaning in a broader range of conditions than we, who can command comfort at the push of a button, are often able to imagine, our sense of possibility withering under the cool dry air, perhaps.  Very few of us would actually be stricken with heat stroke by continuing with our daily household toil in all but the rarest of conditions. Read More here