4 September 2015, Climate News Network, Global tree census highlights need to restore forests. Mapping the density of forests reveals that there are far more trees on the planet than previously thought – but humans are destroying 15 billion a year. An international collaboration of scientists has just completed the ultimate green census – by calculating that the planet is home to 3.04 trillion trees. The latest estimate is far higher and almost certainly more accurate than any previous attempt. But the bad news is that humans are removing trees at the rate of 15 billion a year – and there are now about half as many as there were at the dawn of civilisation. For every person on Earth, there are 422 trees – in total, more than 3,000 billion deciduous or evergreen growths with woody trunks greater than 10 centimetres at breast height. The researchers based their study on close analysis of satellite imagery, and of data from 429,775 plots of trees as measured on the ground in 50 countries on every continent except Antarctica. Statistical techniques. They counted forests in 14 “biomes” − or different kinds of climate, soil and topography − and in places not normally associated with trees, such as deserts, savannah, swamps, tundra and high mountains. They then they used statistical techniques that could extend their sample density measurements to the whole terrestrial world. The scientists report in Nature journal that the tropical and subtropical forests are home to 1.39 trillion trees, while the boreal forests of the north contain 0.74 trillion, and the temperate zones hold 0.61 trillion. Read More here
Monthly Archives: September 2015
3 September 2015, Renew Economy, Graph of the Day: Big carbon cuts will not pull down economy. Australia Prime Minister Tony Abbott insists that the world should protect its one and only planet, but not at the cost of economic growth. Apart from the question of what sort of economic growth could be achieved in a degraded environment – think of the impacts on crops and agriculture, water scarcity, infrastructure and storm damage – here is some good news: setting ambitious targets to cut carbon emissions does not need to impact economic growth. How do we know this? Because the Abbott government’s own modelling tells us so. They commissioned economist Professor Warwick McKibbin to model the impact on various levels of emission reductions out to 2030. The blue bars on the left show us the various modelling of economic growth assuming no emission reductions. The dark bars show the impact with a 26 per cent target by 2030, and a 45 per cent target. Read More here
2 September 2015, The Guardian, The easiest way to respond to a natural disaster? Blame God or global warming. For politicians, it’s convenient to have an incorporeal bogey man for a scapegoat. And the bonus is that global warming doesn’t vote. Katrina was the big bad storm for which we were totally unprepared. It’s like adulthood. You know it’s coming. You think you’re ready but you’re not. You’ve completely underestimated its force and power. Of course we can blame our buddy Brownie and company for how the emergency response was mishandled, but what actually caused the storm, again? It’s uber fashionable to blame global warming in some circles and god in another – but what do scientists have to say? Savvy politicians blame natural disasters like Katrina on global warming, but then deny global warming exists when it becomes too expensive to do anything about it or when they need campaign donations. It’s convenient to have an incorporeal bogey man to blame. And bonus: global warming doesn’t vote. When pressed by concerned constituents to say what they’re actually doing about this growing environmental menace to society, politicians spring into action by assembling task forces (because people work so well in groups). At the speed of evolution, politicians will superficially review the task force’s findings, dispute the findings, shelve the findings and start the process again – but only if pressed. This data dance might take about 10 years to do, which is just in time for the next natural disaster. Read More here
2 September 2015, Washington Post, Wildfires have now burned a massive 8 million acres across the U.S. As of Tuesday, according to the National Interagency Fire Center, more than 8 million acres have burned in U.S. wildfires in 2015. 8,202,557 of them, to be precise. That’s an area larger than the state of Maryland. And the numbers are still growing: 65 large fires are currently raging across the country, particularly in California, Oregon, Washington, Idaho and Montana. That includes three Washington state fires or fire complexes that are larger than 100,000 acres burned. As of this writing, the United States remains at wildfire preparedness level 5 — the highest level — where it has been since Aug. 13. There are only six other years that have seen more than 8 million acres burned — 2012, 2011, 2007, 2006, 2005, and 2004 — based on National Interagency Fire Center records that date back to 1960. It is hard not to notice that all of these years came since the year 2000. Read More here