Group items tagged

Also the chart below taken from a Climate Spectator article by Dr Jenny Riesz is one of the most illuminating. It shows the cross-over point between the cost of wind and a gas combined-cycle power plant depending on gas and carbon prices. While it is slightly out of date with the cross-over between wind and gas now about $1 per GJ lower than indicated, it still provides a good illustration of how gas and the carbon price influence the economics between wind versus gas.

"South Gippsland is blanketed with more than a dozen licences for unconventional gas exploration - which uses controversial techniques to extract hard-to-reach gas. For now, nothing is happening. In August 2012, the state government announced a moratorium on coal seam gas exploration and on the drilling method known as fracking, in which water, sand and chemicals are pumped underground at great pressure to fracture coal or rock, and release gas. Even so, people are worried, fearful about risks to water supplies and local health, as well as the price and productivity of their land. Poowong has declared itself "coal and coal seam gas free" and six other towns are likely to do the same before the year is out."

"Coal seam gas has an image problem, as a former Santos chairman and others in the industry have acknowledged. The way the industry extracts natural gas from deep underground coal seams, both here and overseas, has meant that a lot of people have a lot of questions about CSG's safety and sustainability, particularly in relation to its effects on people's health and that of the natural environment."

"South Gippsland is blanketed with more than a dozen licences for unconventional gas exploration - which uses controversial techniques to access hard-to-extract resources. For now, nothing is happening. In August 2012, the state government announced a moratorium on coal seam gas exploration and on the drilling method known as fracking, in which water, sand and chemicals are pumped underground at great pressure to fracture coal or rock, and release gas."

"Recently reported leaks of water containing high levels of radioactive uranium from a coal seam gas (CSG) wastewater pond operated by Santos in New South Wales put the spotlight on an industry already wracked by controversy. Most concerns over CSG have to date focused on "fracking" - fracturing deep rock strata to get at gas in coal seams - but as the incident shows, waste produced by CSG wells and brought to the surface is another major environmental issue."

"When we talk about greenhouse gases we usually talk about carbon dioxide. When media reports depict climate change, we invariably see the cooling towers of a coal power station. Which is fair, because carbon dioxide, or CO2, is the big one: nearly 75% of Australia's total greenhouse gas emissions are carbon dioxide. Most of those come from the energy sector and the combustion of fossil fuels. But there are other gases involved in the greenhouse story. Methane and nitrous oxide are also contributors to Australia's greenhouse gas account. And both have a much greater impact on the atmosphere in terms of global warming than carbon dioxide."

"Ferguson spies a green energy future … and steps on the gas"

"By the end of this decade, it estimates that onshore wind will be the cheapest source of energy we have. At an average cost of $90 per megawatt-hour (MWh) and in some cases as cheap as $60/MWh it will be cheaper than coal and cheaper than gas. By 2030, the cheapest option will be solar PV, which could cost as little as $50/MWh, followed closely by wind and landfill gas."

"The Clean Energy Regulator has today released the 2012-13 National Greenhouse and Energy Reporting (NGER) data publication. The publication includes the total scope 1 greenhouse gas emissions, total scope 2 greenhouse gas emissions and net energy consumption data reported for the 2012-13 financial year for these corporations."

"Global greenhouse gas emissions from burning fossil fuels reached the highest levels in human history last year, driven predominantly by Chinese growth, and are projected to surge even further in 2013. New data from the Global Carbon Project - a team of international scientists who track global emissions - finds carbon dioxide released from burning fossil fuels and making cement grew 2.2 per cent in 2012 from the previous year. In 2013 a further 2.1 per cent rise is expected. But the latest data suggests the world's emissions could be slowing. The approximate 2 per cent growth in 2012 and 2013 falls short of the 3.1 per cent average annual rise since 2000. CSIRO climate scientist Dr Pep Canadell - who is also executive director of the Global Carbon Project - told Fairfax Media the emissions rates of the past two years could be the tentative signs of a global slow down."

"Australia has a problem with its power system that goes to the core of many issues we're facing at the moment - increasing coal and gas prices, changing electricity usage, and climate change. That's the problem of resilience: how well our power system can adapt to change. Right now, our power system is not in a position to adapt to change. If temperatures rise as expected; if the global price of coal and gas increase dramatically; if global carbon reduction becomes binding; or we start changing our electricity usage patterns, adjusting the system will be very expensive."

"Remember carbon capture and storage? Five years ago, the idea of grabbing the carbon dioxide from coal and gas power plants and burying it deep underground was considered an essential technology for curbing the world's greenhouse-gas emissions. A diagram of how various sorts of carbon capture might work. (Congressional Budget Office) But carbon capture hasn't fared well in the years since. Since 2008, world governments committed at least $25 billion to fund large-scale demonstration projects, the Financial Times reports. And we have remarkably little to show for it so far."

Twenty-one coherent major initiatives could together stimulate sufficient reductions by 2020 to bridge the global greenhouse-gas emissions gap.

"Power generation from hydro, wind, solar and other renewable sources worldwide will exceed that from gas and be twice that from nuclear by 2016, the International Energy Agency (IEA) said today in its second annual Medium-Term Renewable Energy Market Report (MTRMR). According to the MTRMR, despite a difficult economic context, renewable power is expected to increase by 40% in the next five years. Renewables are now the fastest-growing power generation sector and will make up almost a quarter of the global power mix by 2018, up from an estimated 20% in 2011. The share of non-hydro sources such as wind, solar, bioenergy and geothermal in total power generation will double, reaching 8% by 2018, up from 4% in 2011 and just 2% in 2006."

"Electricity and gas bills"

"Many Australian consumers and businesses are working on ways to reduce their greenhouse gas emissions. For some, the carbon tax meets their needs: it's designed to specifically motivate changes in behaviour by raising the costs associated with the production of pollution. But others are looking for more direct measures. Do offsets fit the bill?"

"How can putting a price on carbon lower greenhouse gas emissions? Get to grips with the theory of how carbon pricing works."

Last week the world's atmosphere took a giant leap backward. For the first time in more than 3 million years, the atmospheric concentration of carbon dioxide (CO2) reached 400 parts per million. This was recorded at the National Oceanic & Atmospheric Administration's Earth System Research Laboratory located on Mauna Loa in Hawaii right out in the middle of the Pacific Ocean, a long way from major sources of CO2 in Asia and North America. What this means for the environment is uncertain but it's likely that, if no measures are taken to reduce this level of greenhouse gas, we could be headed for 3-4 degrees C warming globally by the end of this century

"THE Customer DATA centers run by Apple are now entirely fueled by renewable energy, as are 75% of all its corporate facilities, according to the company's recently released 'Apple and the Environment` report. But despite the commitment demonstrated by building one of the world's largest solar arrays, as well as a biogas plant, beside its new iCloud facility in Maiden, North Carolina, the annual review of environmental impact also acknowledges that the total greenhouse gas emissions attributable to Apple's products and operations rose by 34% in 2012."

"The world's biggest greenhouse gas emitter, China, has proposed to install a cap on emissions by 2016. The proposal is being hailed as major breakthrough in the push to address global climate change."