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The Conversation

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The Conversation last won the day on August 13 2016

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  1. 2015 will likely be the hottest year on record, according to a preliminary analysis released by the World Meteorological Organization. Worldwide temperatures are expected for the first time to reach more than 1℃ above pre-industrial temperatures. The five years from 2011-2015 will also likely be the hottest five-year period on record. Average global atmospheric CO₂ concentrations over three months also hit 400 parts per million for the first time during the southern hemisphere Autumn this year. On top of this, we are experiencing one of the strongest El Niño events ever recorded.
  2. More than 146 countries covering 87% of global greenhouse gas emissions have now submitted their national pledges to tackle climate change in advance of the major climate summit in Paris. These are known as Intended Nationally-Determined Contributions. Note the language: these aren’t commitments and are only “intended”. Since collectively these INDCs would still leave us on course for nearly 3℃ warming, some way beyond the 2℃ target that the international community has settled on as a safe threshold, the hope is that they will be ratcheted up at Paris and beyond. But will cou
  3. The revelation that Volkswagen deliberately circumvented emissions tests on many of its diesel vehicles has provoked a huge storm of controversy. This diesel deception has understandably angered car owners. And some have suggested that VW’s management either must have known about the scandal, or effectively lost control of the company. The allegations are severe. According to the Environmental Protection Agency, VW deployed a “defeat device” enabling its cars to meet emissions standards under official test conditions, even though they can release up to 40 times the legal level of nitrogen oxid
  4. Many observations have shown that sea level rose steadily over the 20th century – and at a faster rate than over the previous centuries. It is also clear from both satellite and coastal observations that seas have risen faster over the past two decades than they did for the bulk of the 20th century. More recently, several studies have shown that the flow of ice and water into the oceans from Greenland and West Antarctica has increased since 1993. This raises an interesting question: has the rate of sea-level rise changed since 1993, when satellite observations began to give us a more complete
  5. This week, The Guardian newspaper has campaigned for the Bill and Melinda Gates Foundation to divest its fossil fuel investments – which the newspaper claims are worth US$1.4 billion. The foundation can and should address the climate crisis, particularly given the threat it poses to food security, public health, human rights, and the development agenda. Practical responses The Gates Foundation has made a significant contribution to practical responses to poverty, and Bill Gates has been a long-standing advocate of “creative capitalism” to address global development issues. To
  6. What are countries really bringing to the negotiating table when the world meets to thrash out a greenhouse deal in Paris this year? The stakes are high – the hoped-for deal at the 2015 summit will be the first since the landmark Kyoto Protocol in 1992, and could commit countries to cutting their greenhouse gas emissions beyond 2020. Throughout the year, countries will submit draft contributions known as INDCs or Intended Nationally Determined Contributions. These may be baselines and targets (such as 40% below 1990 levels by 2030), but may also take other forms. Contributions will be submitte
  7. Under the Dome, the self-funded documentary by former television news anchor Chai Jing about China’s battles with smog, has been an internet phenomenon. Within three days of its release on Febuary 28, it had racked up more than 150 million views and garnered 280 million posts on Sina Weibo, a Chinese equivalent of Twitter. Then the Chinese government removed it from the web, stung by the criticism the film prompted, leaving those who had hailed it as a landmark moment in Chinese environmentalism wondering if the documentary’s influence would end up being curtailed. Seemingly inspir
  8. There is no direct evidence that wind turbines affect physical or mental health, according to a review of the evidence by the National Health and Medicine Research Council (NHMRC). The review found no direct link between health effects and wind turbines, including pathological anxiety, depression, changes in blood pressure, heart disease, and ringing in the ears. However, due to the generally poor quality of the current evidence, the council recommended further high quality research, particularly within 1,500 m of wind turbines. More than 4,000 pieces of evidence were considered, but only 13 w
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