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Empty cans of pesticide in a ditch at a farm in Arusha, Tanzania. Photo by Norwegian School of Veterinary Science

From ScienceDaily

An increase in human activity is posing a threat to natural aquatic ecosystems in Tanzania and contributing to environmental damage and ecological changes.

Doctoral research carried out by Hezron Emmanuel Nonga shows that agriculture and livestock farming leads to eutrophication in lakes and the proliferation of cyanobacteria which produce microcystins. New information about microcystins and other mycotoxins in Tanzanian lakes is useful for appraising the risk linked to drinking water and edible fish, which in turn affects the health of both humans and animals.

In Tanzania, there are many and varied wetland areas and aquatic ecosystems which are productive but also vulnerable. Hezron Emmanual Nonga’s doctoral research project has studied how human activities affect ecosystems in wetlands and has also examined the incidence of cyanobacteria, the production of microcystins and the possible effects of these toxins on wild species.

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By John Quiggin from The National Interest

In political terms, the issues of climate change and energy took a back seat for most of 2011. There was some modest progress at the Durban conference in December. Moreover, having given up on the idea of cap-and-trade legislation, the Obama administration took some significant regulatory measures including new fuel-economy standards and restrictions on old coal-fired power plants.

The truly significant developments, however, were not driven by politics, although they will have profound political implications. In 2011, nuclear power ceased to be a serious option for meeting the world’s energy needs, and solar photovoltaics (PV) finally became an option worth noting.

The “solar vs. nuclear” dispute had been largely symbolic for several decades. After rapid growth in the 1960s and 1970s, new installations of nuclear power came to a grinding halt. This was partly a result of safety fears created by the accidents at Three Mile Island and Chernobyl. Economic factors were even more significant. Far from being too cheap to meter, nuclear power turned out to be far more expensive than its main rival, coal, primarily because of unpredictable capital costs and generally high interest rates.

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By Elisabeth Rosenthal from The New York Times

Clamshell containers on supermarket shelves in the United States may depict verdant fields, tangles of vines and ruby red tomatoes. But at this time of year, the tomatoes, peppers and basil certified as organic by the Agriculture Department often hail from the Mexican desert, and are nurtured with intensive irrigation.

Growers here on the Baja Peninsula, the epicenter of Mexico’s thriving new organic export sector, describe their toil amid the cactuses as “planting the beach.”

Del Cabo Cooperative, a supplier here for Trader Joe’s and Fairway, is sending more than seven and a half tons of tomatoes and basil every day to the United States by truck and plane to sate the American demand for organic produce year-round.

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Image by Frankh, via Flickr

By Larry Greenemeir from Scientific America

It’s easy to knock electric vehicles (EVs): It takes too long to recharge the batteries and there are too few places to do it. And besides, who will pay for all the new recharging stations that would be needed if the cars catch on? The International Energy Agency’s most optimistic scenario puts (pdf) plug-in hybrids or EVs at 15 percent of all cars on the road by 2020; other projections predict a mere 3 percent.

The dubious outlook for EVs has much do to with uncertainty over what role utility companies should play in providing the electricity needed for large fleets of these vehicles. At a recent conference, however, industry analysts put several options on the table.

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Image by Brett Ryder

From the Economist

SHORTLY before the 2009 UN climate summit in Copenhagen, many companies got into green. The summit was expected to lead to new regulations restricting greenhouse-gas emissions. Dozens of chief executives came to see history being made and to be seen on the right side of it. But Copenhagen was a flop. Most firms turned their thoughts elsewhere. Only four bosses showed up at the next annual climate meet, in Cancún. Few are expected at this year’s bash, which begins in Durban on November 28th.

Alas, that represents a realistic assessment of the Durban summit’s chances of delivering anything like the long-term certainty that businesses crave. Of 300 bosses of big global firms recently quizzed by Ernst & Young, 83% said they wanted to see a legally binding multilateral deal struck in Durban to update the ailing Kyoto protocol and help to put a price on carbon emissions. But only 18% expect this to happen. The absence of a clear climate policy helps explain why, for example, investment in British clean technology fell from around $11 billion in 2009 to $3 billion last year. It would also suggest that any firm factoring a steep carbon price into its plans—as Shell does, assuming a notional price of $40 a tonne—should quietly lower it.

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