Concentrating Solar Power - No Resource Constraints
July 5, 2012 07:38 AM - ScienceDaily
A recently published study confirms that solar thermal power is largely unrestricted by materials availability. There are, however, some issues that the industry needs to look into soon, like replacing silver in mirrors. In the wake of Chinese export restrictions on rare earth metals, the dependence of some renewable technologies on scarce materials has gained attention. Several players in the wind and PV industry are struggling to get away from excessive use of restricted elements, such as indium or rare earth metals. Meanwhile, there has been a shared notion amongst solar scientists and industry that Concentrating Solar Power (CSP) should "probably" be less restricted, being built mainly on commonplace commodities like steel and glass.
Fish and Soybean Farmers to Shake Hands?
July 3, 2012 12:10 PM - Samantha Neary, Triple Pundit
The open ocean aquaculture industry may have just made a new friend — the soy industry. The Soy Aquaculture Alliance is ever closer to making an agreement to use soy as feed in open ocean fish farming pens in federal waters, a move that would reportedly impact the marine environment as well as the diets of both fish and consumers — and not necessarily in a good way. According to a new report by Food & Water Watch, an independent public interest organization funded through members, individual donors, and foundation grants, a collaboration between these two industries could be devastating to ocean life and consumer health.
Pakistan unveils sustainable development strategy
July 3, 2012 09:31 AM - T.V. Padma, SciDevNet
Pakistan's new national sustainable development strategy (NSDS) boasts a 'green action agenda' and proposes to set up a knowledge management system that is based on science, technology and innovation.
The real disappointment of the Rio+20 Conference
July 3, 2012 07:12 AM - EurActiv
World leaders attending the recent Rio+20 conference agreed to promote sustainable consumption and production, but analysts say getting businesses and buyers to do just that will require far more than words on paper. To the immense disappointment of environmental groups and even some multinational corporations, Rio+20 failed to produce binding commitments or a plan on how to strike a balance between consumer demand and the availability of natural resource. "The current deal on the Rio table is really scraping the barrel — with woolly definitions, old ideas and missing deadlines," said Craig Bennett, Friends of the Earth's director of policy and campaigns. "It doesn’t come close to solving the planetary emergency we're facing."
Los Angeles City Council OKs Plastic Bag Ban
July 1, 2012 08:58 PM - Scott Sincoff, ENN
The "City of Angels" is now taking a larger step in environmentalists’ fight against the United States’ plastic usage. Los Angeles, California has become the biggest city in the U.S. to implement a ban on plastic bags at supermarket checkout counters. The legislation—approved 13-1 by Los Angeles City Council on May 24th—was a victory for environmentalists and was the government’s way to tell city residents that they need to do their part in the effort to protect the environment. Los Angeles will also start charging ten cents per paper bag in supermarkets as well. The plan will be phased over a 16-month period in L.A.’s approximately 7,500 supermarkets.
The Story of Fair Trade Tea - Why it's so important
July 1, 2012 06:30 AM - Fair Trade USA, Triple Pundit
Pour a cup of tea, let it steep, and then take a sip as you ponder this fact: After water, tea is the most popular beverage in the world, with 15,000 cups drunk per second. Tea is everywhere — in our cafes, our kitchens, our offices, schools and stores — but how many of us really know the story of each leaf as it travels from field to cup? The tea supply chain is a complex trade network with many different players. Each and every farmer, worker, exporter, importer, processor, auctioneer, buying agent, retailer, café worker and tea drinker in the chain played an important role in bringing you the world’s favorite beverage.
Would more trees in the Arctic absorb carbon, or cause more to be released?
June 27, 2012 05:55 AM - Tom Marshall, Planet Earth Online
Trees colonising formerly open tundra as the climate warms could cause Arctic ecosystems to release vast amounts of stored soil carbon into the atmosphere, a new paper argues. Many climate models have assumed that trees taking over the Arctic, and the enormous increase in plant biomass this would bring, would cause these landscapes to absorb much more carbon than they did before, helping restrain the effects of climate change. But this study suggests that's far from certain. In Scandinavia at least, when tundra heath turns into birch woodland it seems it could release much of the carbon stored in the soil into the air. This will more than counterbalance the fact that a forest holds around twice as much carbon in its biomass. So far from holding climate change in check, accelerated tree growth, and colonisation of treeless landscapes, could speed it up.
June 26, 2012 11:30 AM - Andy Soos, ENN
In the most general sense of the word, a cement is a binder, a substance that sets and hardens independently, and can bind other materials together. Cement is made by heating limestone with small quantities of other materials to 1450 °C in a kiln, in a process known as calcination to form calcium oxide, or quicklime, which is then blended with the other materials that have been included in the mix. The resulting substance is then ground to make "Portland Cement". Portland cement is a basic ingredient of concrete, mortar and most non-specialty grout. The most common use for Portland cement is in the production of concrete. In response to a federal court ruling and data from industry, the U.S. Environmental Protection Agency (EPA) is proposing changes to its 2010 air standards for the Portland cement manufacturing industry. The proposal would continue the significant emission reductions from the 2010 standards while providing industry additional compliance flexibilities, including more time to implement the proposed updates by extending the compliance date for existing cement kilns from September 2013 to September 2015.
Sea Level Rise may continue for Centuries
June 26, 2012 04:35 AM - Staff, ClickGreen
Sea levels around the world can be expected to rise by several meters in coming centuries, if global warming carries on, according to new research. The study is the first to give a comprehensive projection for this long perspective, based on observed sea-level rise over the past millennium, as well as on scenarios for future greenhouse-gas emissions. "Sea-level rise is a hard to quantify, yet critical risk of climate change," says Michiel Schaeffer of Climate Analytics and Wageningen University, lead author of the study. "Due to the long time it takes for the world's ice and water masses to react to global warming, our emissions today determine sea levels for centuries to come."
Sea Level Rise on US Atlantic Coast 3-4 Times Faster than Global Average
June 25, 2012 10:16 AM - David A Gabel, ENN
The East Coast of the United States is home to many of its major population centers. While some of the early colonizers migrated west, many stayed and built up some of America's great cities, including Portland, Boston, New York, Philadelphia, Norfolk, Charleston, and Miami. Now this region is facing an unprecedented challenge caused by the changing climate. The sea level is rising, and due to a variety of oceanographic and topographic factors, it is rising faster on the US Atlantic Coast than it is globally. The greatest increase will be felt in the "hot zone", from Cape Hatteras, North Carolina to north of Boston, Massachusetts.