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Benno Hansen

Biodiversity loss matters, and communication is crucial - SciDev.Net - 0 views

  • at root is the conflict between the need to radically change our use of natural resources and the desire to maintain current forms of economic growth
  • enhancing the media's ability to communicate messages emerging from the underlying science
  • governments signed up to the Convention on Biological Diversity (CBD) have missed their 2010 target, set in 2002, of achieving "a significant reduction in the rate of biodiversity loss"
  • ...4 more annotations...
  • Finally the apocalyptic tone sometimes used in attempts to drive a message home can further hinder the case for constructive action. Too often, it promotes either cynicism or apathy among those who cannot relate these disaster scenarios to their own personal experience.
  • he issues scientists think most important often seem abstract and far removed from the day-to-day concerns of ordinary people
  • sloppy scientific reasoning can have a broad and lasting impact
  • embed this scientific evidence into viable but sustainable economic growth and development strategies
Skeptical Debunker

Bloom Energy Promises Cheap, Emissions-Free Power From a Small Box | Popular Science - 0 views

  • The Bloom Box idea came from K.R. Sridhar, a former NASA rocket scientist who once built a similar box device to generate oxygen on Mars for future colonists. Sridhar simply turned the concept on its head by pumping oxygen into the box, along with fuel. The oxygen and fuel combine within a new type of fuel cell to create the chemical reaction that makes electricity. There's also no need for power lines coming in from an outside source, and Sridhar envisions the box eventually providing energy wirelessly to homes and businesses. That could do away with traditional power plants and the power grid. Such transformative power may only come about if the Bloom Box fuel cells can work reliably and efficiently -- other fuel cell technologies have proven notoriously finicky. Sridhar makes his fuel cells based on cheap sand-based ceramics, coated with special green and black "inks" that allow for the chemical reaction which makes electricity. One of the simple disks can power a light bulb, and a stack of 64 disks with cheap metal plates in between them can supposedly power a Starbucks. And unlike fuel cells that require pure hydrogen, the Bloom Box can use fuels ranging from natural gas to bio-gas.
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    A boxy power plant that could one day produce efficient, inexpensive, clean energy in every home might sound like a pipe dream, but it's the very real product of a Silicon Valley startup called Bloom Energy. Twenty large corporations that include Google, FedEx, Walmart and eBay have already purchased and begun testing the Bloom Boxes. 60 Minutes recently got a sneak peek at this possibly game-changing energy device.
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    Here's SOME of the "rubs". How long will the device's last and what are the maintenance costs (if any)? What will the cost of the fuel be and how much is used? Will the manufacturing process "scale up nicely" (and easily) so that "economies of scale" will actually bring the price of a home-system down to around $3-5K? Will the price of the system, its maintenance, and fuel actually come out to be significantly less than the price of "grid delivered" electricity? Without "good enough" answers to such questions, this system may be more of a good remote generation facility than a grid replacement.
Skeptical Debunker

Pliocene Hurricaines - 0 views

  • By combining a hurricane model and coupled ocean-atmosphere general circulation model to investigate the early Pliocene, Emanuel, Brierley and co-author Alexey Fedorov observed how vertical ocean mixing by hurricanes near the equator caused shallow parcels of water to heat up and later resurface in the eastern equatorial Pacific as part of the ocean wind-driven circulation. The researchers conclude from this pattern that frequent hurricanes in the central Pacific likely strengthened the warm pool in the eastern equatorial Pacific, which in turn increased hurricane frequency — an interaction described by Emanuel as a “two-way feedback process.”�The researchers believe that in addition to creating more hurricanes, the intense hurricane activity likely created a permanent El Nino like state in which very warm water in the eastern Pacific near the equator extended to higher latitudes. The El Nino weather pattern, which is caused when warm water replaces cold water in the Pacific, can impact the global climate by intermittently altering atmospheric circulation, temperature and precipitation patterns.The research suggests that Earth’s climate system may have at least two states — the one we currently live in that has relatively few tropical cyclones and relatively cold water, including in the eastern part of the Pacific, and the one during the Pliocene that featured warm sea surface temperatures, permanent El Nino conditions and high tropical cyclone activity.Although the paper does not suggest a direct link with current climate models, Fedorov said it is possible that future global warming could cause Earth to transition into a different equilibrium state that has more hurricanes and permanent El Nino conditions. “So far, there is no evidence in our simulations that this transition is going to occur at least in the next century. However, it’s still possible that the condition can occur in the future.”�Whether our future world is characterized by a mean state that is more El Nino-like remains one of the most important unanswered questions in climate dynamics, according to Matt Huber, a professor in Purdue University’s Department of Earth and Atmospheric Sciences. The Pliocene was a warmer time than now with high carbon dioxide levels. The present study found that hurricanes influenced by weakened atmospheric circulation — possibly related to high levels of carbon dioxide — contributed to very warm temperatures in the Pacific Ocean, which in turn led to more frequent and intense hurricanes. The research indicates that Earth’s climate may have multiple states based on this feedback cycle, meaning that the climate could change qualitatively in response to the effects of global warming.
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    The Pliocene epoch is the period in the geologic timescale that extends from 5 million to 3 million years before present. Although scientists know that the early Pliocene had carbon dioxide concentrations similar to those of today, it has remained a mystery what caused the high levels of greenhouse gas and how the Pliocene's warm conditions, including an extensive warm pool in the Pacific Ocean and temperatures that were roughly 4 degrees C higher than today's, were maintained. In a paper published February 25 in Nature, Kerry Emanuel and two colleagues from Yale University's Department of Geology and Geophysics suggest that a positive feedback between tropical cyclones - commonly called hurricanes and typhoons - and the circulation in the Pacific could have been the mechanism that enabled the Pliocene's warm climate.
Benno Hansen

BBC News - Kenya's largest forest under threat - 1 views

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    2 min video
plantoraapp

How To Grow And Care For Red Hot Poker Plant - Plantora - 0 views

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    Red Hot Poker, also known as Kniphofia, is a striking perennial plant with unique, vibrant, torch-like flowers. To grow and care for Red Hot Poker Plant, you'll need to consider several factors, including planting, soil preparation, watering, and maintenance. Red hot poker plants are pollinator-friendly and attract hummingbirds, bees, and butterflies. Know how you can grow and take care of the amazing red hot poker plant. Also, discover some famous varieties to grow. So let's look at some plant care tips that can help you grow and maintain the red hot poker plant.
plantoraapp

Top 10 Trees With Pink Flowers - Plantora - 0 views

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    Trees with pink flower add a bright and cheerful touch to your garden. Flowering trees are the perfect addition to any garden setup if you have the space and patience for them to grow. Therefore, we bring you a list of top trees with pink flowers that you can grow. Trees with pink flowers can be a great addition to your garden as they can improve its overall appeal. Use free plant identifier app to identify flowers and trees.
plantoraapp

Skeleton Flower Care: A Complete Guide - Plantora - 0 views

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    The Skeleton Flower, scientifically known as Diphelleia grayi, is a unique and fascinating plant known for its translucent, white petals. Native to the mountainsides of Japan, China, and the Appalachian region in the United States, the Skeleton Flower is a deciduous perennial that requires specific care to thrive. Remember that the Skeleton Flower is a unique plant, so it's important to provide the specific conditions it needs to thrive. Here's a complete guide on caring for the Skeleton Flower.
plantoraapp

Parlor Palm Care: A Complete Guide - Plantora - 0 views

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    The Parlor Palm, also known as the Neanthe Bella palm or the Good Luck palm, is a popular indoor plant known for its attractive appearance and relatively easy care. Here's a complete guide on how to care for a Parlor Palm: Light, Temperature,Watering, Humidity, Soil, Fertilizing, Pest and Propagation. Read the full article for healthy and thriving Parlor Palm in your indoor space.
plantoraapp

15 Best Indoor Flowering Plants For Beginners - Plantora - 0 views

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    But what's better than green indoor flowers? That's right! Indoor Flowering Plants. Therefore, to enhance the general display of your indoor garden we delivered this listing of the exceptional flowering indoor vegetation which can also be grown by way of beginners. These indoor plants require little maintenance and can fill your home with the presence of their attractive and vibrant blooms. So without further ado, here's our pick for the best flowering indoor plants along with their care tips. For more details about indoor flowering plants click on the link and read the full article now.
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