Weekly newspaper from Arnett, Oklahoma that includes local, state, and national news along with advertising.

Weekly newspaper from Hamilton, Texas that includes local, state, and national news along with advertising.

Weekly newspaper from Marshall, Texas that includes local, state, and national news along with extensive advertising.

Weekly newspaper from Carbon, Texas that includes local, state, and national news along with advertising.

Weekly newspaper from Inola, Oklahoma that includes local, state, and national news along with advertising.

Daily student newspaper from North Texas State University in Denton, Texas that includes local, state, and campus news along with advertising.

Daily newspaper from El Paso, Texas that includes local, state and national news along with extensive advertising.

Daily Spanish-language newspaper from San Antonio, Texas that includes local, state, and national news along with advertising.

Daily Spanish-language newspaper from San Antonio, Texas that includes local, state, and national news along with advertising.

Daily newspaper from San Antonio, Texas that includes local, state and national news along with advertising.

There is growing evidence that global warming could become a major global environmental threat during the 21st century. The precautionary principle commands preventive action, at both national and international levels, to minimize this potential threat. Many near-term, relatively inexpensive, mitigation options are available. In addition, long-term research is required to evaluate and develop advanced, possibly more expensive, countermeasures, in the eventuality that they may be required. The utilization of power plant CO{sub 2} and its recycling into fossil fuel substitutes by microalgae cultures could be one such long-term technology. Microalgae production is an expanding industry in the U.S., with three commercial systems (of approximately 10 hectare each) producing nutriceuticals, specifically beta-carotene, extracted from Dunaliella, and Spirulina biomass. Microalgae are also used in wastewater treatment. Currently production costs are high, about $10,000/ton of algal biomass, almost two orders of magnitude higher than acceptable for greenhouse gas mitigation. This report reviews the current state-of-the-art, including algal cultivation and harvesting-processing, and outlines a technique for achieving very high productivities. Costs of CO{sub 2} mitigation with microalgae production of oils ({open_quotes}biodiesel{close_quotes}) are estimated and future R&D needs outlined.

Background information is documented on the mass cultivation of aquatic plants and systems design that is available from the literature and through consultation with active research scientists and engineers. The biology of microalgae, macroalgae, and aquatic angiosperms is discussed in terms of morphology, life history, mode of existence, and ecological significance, as they relate to cultivation. The requirements for growth of these plants, which are outlined in the test, suggest that productivity rates are dependent primarily on the availability of light and nutrients. It is concluded that the systems should be run with an excess of nutrients and with light as the limiting factor. A historical review of the mass cultivation of aquatic plants describes the techniques used in commercial large-scale operations throughout the world and recent small-scale research efforts. This review presents information on the biomass yields that have been attained to date in various geographical locations with different plant species and culture conditions, emphasizing the contrast between high yields in small-scale operations and lower yields in large-scale operations.

Daily newspaper from Enid, Oklahoma that includes local, state, and national news along with advertising.