A Very Big Dead Zone Dead zones are hypoxic (low-oxygen) areas in the world's oceans and large lakes, caused by excessive nutrient pollution from human activities coupled with other factors that deplete the oxygen required to support most marine life in bottom and near-bottom water. In the 1970s oceanographers began noting increased instances of dead zones. These occur near inhabited coastlines, where aquatic life is most concentrated. The vast middle portions of the oceans, which naturally have little life, are not considered dead zones. Scientists are expecting a very large dead zone in the Gulf of Mexico and a smaller than average hypoxic level in the Chesapeake Bay this year, based on several NOAA-supported forecast models. NOAA-supported modelers at the University of Michigan, Louisiana State University, and the Louisiana Universities Marine Consortium are forecasting that this year's Gulf of Mexico hypoxic dead zone will be between 7,286 and 8,561 square miles which could place it among the ten largest recorded. That would range from an area the size of Connecticut, Rhode Island and the District of Columbia combined on the low end to the New Jersey on the upper end. The high estimate would exceed the largest ever reported, 8,481 square miles in 2002.
Hawaii's Fishermen: Scapegoats for Forces Outside their Control Climate change is affecting fisheries in the Western Pacific and around the world, but a host of other factors, including land use, are threatening fisheries and the health and integrity of marine ecosystems. Aiming for sustainable fisheries, marine policymakers, resource managers, fishermen and other stakeholders are increasingly looking to take a more holistic, integrated approach to fisheries management, as evidenced during the latest meeting of the Western Regional Fishery Management Council (WRFMC) meeting, which was held in Oahu. Often blamed for overexploiting fish stocks, local fishermen in Hawaii are keenly aware of external impacts on the health and integrity of marine ecosystems and fish populations. At the latest WRFMC meeting in Honolulu, they argued in support of taking a more comprehensive ecosystems management approach, specifically zooming in on how land use and associated runoff from cities, agriculture and industry are harming marine ecosystems and fisheries.
Is EV battery technology more advanced than we thought? Are EV manufacturers holding something back?
If we take a look at the EV market it seems that we have barely moved on, at least in the mass market, since the General Motors EV1 debacle in the 1990s. Mainstream battery journey capacity is still roughly the same as was available for the EV1 despite the fact that the industry has received billions of dollars in additional funding from governments and private investors. So, are EV manufacturers holding something back?
There is some speculation that various EV manufacturers are holding back the best of their technology until it has been fine tuned and thoroughly tested. There is speculation that while some of the "financially weak" companies are falling by the wayside, in the shape of Fisker for example, we are starting to see some stronger companies emerge from the market. This is potentially the perfect storm for the EV market, with companies falling by the wayside leaving the lion's share of future investment to those looking further forward and able to give stability and long-term credibility.
Dams, The Whole Picture Dams are good for hydroelectric power. But just like figuring how to reduce waste or improve energy efficiency, one has to look at the whole picture and all of the potential media effects. Researchers conclude in a new report that a global push for small hydro-power projects, supported by various nations and also the Kyoto Protocol to reduce greenhouse gas emissions, may cause unanticipated and potentially significant losses of habitat and biodiversity.
Aquatic Environment Biodiversity Threatened by Pesticides The use of pesticides have been debated for some time now, as research indicates their use can have a negative effect on the environment. As an agent meant to prevent, destroy or mitigate any pest, pesticides target unwanted plants and animals that can alter ecosystems, cause nuisance, or spread disease. Besides potentially being toxic to humans and other animals, new research conducted by an international team of scientists has revealed that pesticides are responsible for reducing regional biodiversity of invertebrates by up to 42 percent.