For the first time in U.K. history, an alien species (meaning one that is not native to the area) will be let loose in the kingdom to combat the growth of another species--also introduced. [More]

Whereas most discarded plastic water and beverage bottles (those imprinted with a number 1 within a triangular arrow) can be recycled , the resulting second-generation plastic is generally unusable for making new plastic bottles. This is because the polyethylene terephthalate (PET) thermoplastic polymer used to make the original bottles is often made with the help of metal oxide or metal hydroxide catalysts that linger in the recycled material and weaken it over time. [More]

WASHINGTON--Every second, our bodies capture carbon dioxide in our tissues, transport it via the blood, and dump it in the lungs from where it is exhaled. This unconscious process is yet another way humans contribute to the accumulation of the greenhouse gas in the atmosphere--albeit in a miniscule volume compared with burning fossil fuels . The key to this metabolic process is an enzyme called carbonic anhydrase and it's efficiency at capturing and releasing CO2 is what human engineers want to mimic at the power plant scale. [More]

[ This special issue podcast is longer than the usual 60 seconds. ]

Last week, the new Advanced Research Projects Agency for energy held its inaugural conference in Washington, D.C.--a direct response to a growing sense that the U.S. is losing its technology lead when it comes to the race for cleaner ways to produce and use energy. "We have a Sputnik moment right now. We are losing our technology leadership and we are falling behind."

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Editor's Note: Journalist and crew member Kathryn Eident and scientist Jeremy Jacquot are traveling on board the RV Atlantis on a monthlong voyage to sample and study nitrogen fixation in the eastern tropical Pacific Ocean, among other research projects. This is the sixth blog post detailing this ongoing voyage of discovery for ScientificAmerican.com .

Imagine you’re in space, floating high above the Earth. Picture the world’s oceans, glimmering sapphire under the heat of the sun and the protection of the ozone layer. Look closer, there’s a patch of brown in the middle of all that blue. It’s a bloom of phytoplankton called Trichodesmium , a “world famous” nitrogen fixer. [More]

Continuous change in agricultural land use directly affects Europe's biodiversity. A new report by the European Environment Agency (EEA) finds that Common Agricultural Policy payments could be used more effectively to support High Nature Value farmland and help halt biodiversity loss.

SeeSouthernForests.org provides a new way to learn about, and protect, the forests of the southern United States.

Changes over a large area are often hard to see. This can be especially true when it comes to forests where incremental forest loss often goes unnoticed until it is too late. A new website and report by the World Resources Institute seek to change this and allow people to visualize the trends and drivers of change affecting southern forests.

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If you happen to be hiking in the right part of Florida at dawn, you might catch the sound of a predator hidden in the vegetation. Surely an alligator must be the source of these calls, you say to yourself. But the sound does not come from an alligator, or a mother bear, or some newly introduced predator from the Amazon. It comes from a human predator--a “worm grunter.”

Worm grunters have mastered the art of charming worms out of their burrows so they can be collected and sold as bait. First, the hunters pound a stob, or wooden stake, into the soil, and then they rub the stake with a flat piece of metal called a rooping iron. The vibrations resonate through the ground. In response, hundreds of large earthworms emerge, some as far as 12 meters from the baiter.

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Nine months after it created its first list of protected endangered species , the government has added 15 more to the list, including what has been billed as "the world's least-known bird." [More]

Dear EarthTalk: A fisherman friend of mine told me that trout populations in the interior West of the U.S. are already shrinking due to global warming. Is this true? And what is the long term prognosis for the trout? --Jon Klein, Portsmouth, N.H. [More]

The food industry leads the nation in pounds of waste produced annually. So, what’s second? It’s health care facilities. They dispose of more than four billion pounds of waste each year. [More]

WASHINGTON, D.C.--At the inaugural summit of ARPA–E, or the Advanced Research Projects Agency–Energy , no less an august personage than Norman Augustine declared that we were possibly witnessing an inflection point--a turn from old thinking to new. As an aerospace business pioneer, Augustine certainly knows when trajectories change and escape velocities are attained. Indeed, a host of speakers regarded ARPA–E's effort as an Apollo project, a Manhattan project, and Mike Splinter, CEO of Applied Materials, even called for ARPA–E to be part of a potential Marshall Plan for energy--a road map to a future of clean power, complete with the Hoover Dam of solar, or the like. [More]

The more mysteries that scientists unlock, the more opportunities emerge for the next generation of researchers to transform newfound knowledge into tomorrow's breakthroughs that serve society. The Lemelson–M.I.T. Program recognized several potential breakthroughs Wednesday in awarding four of its $30,000 Lemelson–M.I.T. Student Prizes to those from California Institute of Technology (Caltech), the Massachusetts Institute of Technology (M.I.T.), Rensselaer Polytechnic Institute (R.P.I.), and the University of Illinois at Urbana–Champaign (U.I.U.C.). [More]

Dear EarthTalk: What are the environmental implications of all the food we throw away here in the United States? --Mike Schiller, Cambridge, Mass. [More]

NEW YORK--As climatologists weather the IPCC controversy , another storm is brewing, and this one is filled with not with bloggers but with beasts, bugs and bacteria. It is the potential plague of infectious diseases --threatened to be made worse, many scientists propose, by projected changes in the Earth's climate . [More]

Ozone levels in Europe during summer 2009 were among the lowest since comprehensive data reporting started in 1997.

The bountiful fields of the U.S. are awash in atrazine . Some 36 million kilograms of the odorless, white powder are applied on farms to control grassy weeds. Some 225,000 kilograms of the herbicide fall with the rain each year, sometimes up to 1,000 kilometers from the source. All that atrazine may be having another effect: turning male frogs female. [More]

Climactic changes might currently be threatening the survival of polar bears ( Ursus maritimus ), but similar shifts appear to have played an important part in bringing the species into existence in the not too distant past.  [More]

Dear EarthTalk: What are the primary environmental concerns in the aftermath of the big earthquake in Haiti? --Frank Dover, Portland, Ore. [More]

The e-mails come thick and fast every time NASA scientist Gavin Schmidt appears in the press. [More]