New satellite study shows vegetation increases in North America
... "There definitely is a limit to how much carbon dioxide plants can soak up," said Hicke. He said the amount of future uptake of carbon by North American vegetation will depend on the mechanisms that are driving the processes, which still need to be identified. A study published in the May 24 issue of...Reducing primary chemical emissions does not always reduce pollution
... how controlling the chemicals that oxidize sulfur dioxide affected creation of sulfate aerosols," Stein told...sical Union in Boston. "Simply controlling sulfur dioxide does not always reduce sulfate." The researchers found that the reactions involved are not linear ...Ancient oceans experienced a global surge in biological productivity
...e energy from the sun and use it to convert carbon dioxide and dissolved nutrients, such as phosphorus, into ...al productivity could lead to a net loss in carbon dioxide from the atmosphere, which in turn could cause the Earth to cool---an anti-greenhouse effect. "A bas...Tropical glaciers formed while earth was giant snowball
...Earth gradually cools because the amount of carbon dioxide in the Earth's atmosphere decreases. Relatively f...en gradually increasing during that time as carbon dioxide built up. Researchers have estimated that it required a buildup of carbon dioxide by volcanic outga...New plan to force greenhouse gases underground
...earchers at Adelaide University, Australia. Carbon dioxide (CO2) emissions are not only caused by fuel consumption, they are also a byproduct of petroleum production at oil and gas fields, adding to the global greenhouse problem. Now a $1 million study at Adelaide's National Centre For Petroleum Geology & Ge...Climate sensitivity may be higher than many think, researchers say
...g due to a doubling of the concentration of carbon dioxide in the atmosphere," said Michael Schlesinger, a UI atmospheric scientist. "According to the Intergovernmental Panel on Climate Change, the climate sensitivity lies between 1.5 and 4.5 degrees Centigrade." If the climate sensitivity is less than 1.5 ...Biologists: Cell nucleus surface more complicated than expected
...ts to provide food, cleanse water, and turn carbon dioxide into breathable oxygen....New effort to increase coal production announced
...on efficiency and thereby reduce the global sulfur dioxide emissions." Yoon and his colleagues have already made strides in this research arena in the past 20 years leading to the DOEs decision to fund CAST. The best known is the Microcel™ technology, used widely in both the coal and mineral industries...UNC, Penn State scientists find gene that controls water retention in plants
...s exchange the oxygen they produce with the carbon dioxide they use for photosynthesis," he said. "Of course, this gas exchange occurs at the cost of losing water so that plants regulate pore openings carefully via internal signals like abscisic acid." In other experiments published in Science, the UNC te...Biologists discover protein's impace on plant-water balance
...r and oxygen to the atmosphere and takes in carbon dioxide for photosynthesis. Guard cells thereby moderate the amount of water and carbon dioxide in the plants. Researchers Sarah M. Assmann, professor of biology at Penn State, and Xi-Qing Wang, ...Refrigerator disposal releases ozone-depleting chemicals
... sea life and contribute to the increase of carbon dioxide and other greenhouse gases believed to be responsible for atmospheric warming, according to the U.S. Environmental Protection Agency. Because of the dangers of exhausting the ozone layer, more than 120 countries signed the 1987 "Montreal Protocol" to......g) silicate minerals, which in turn removed carbon dioxide from the atmosphere as Ca and Mg became locked tog...iration (carbon oxidation). As atmospheric carbon dioxide was progressively reduced and photosynthesis reached unprecedented levels, the atmosphere became ext...Climate change and coral reefs
...due to higher atmospheric concentrations of carbon dioxide (from fossil fuel burning). However, the adaptability of coral reefs is often underestimated, says Malcolm McCulloch (Australian School of Earth Sciences, Canberra), who presents his research at Earth System processes, a multidisciplinary conference ...Pioneering experiments testing effects of greenhouse gases on crops
...sprouting soybeans grown in the presence of carbon dioxide levels forecast for the year 2050. Next summer, e...d quality as the climate changes. By 2050, carbon dioxide levels are expected to be about 1.5 times greater than the current 370 parts per million, while dayt......n cycle begins when plants use sunlight and carbon dioxide in the air or dissolved in water to make carbohydr... microbes, and ultimately converted back to carbon dioxide and other elements which plants use to start the process all over again. Scientist...World land database charts a troubling course
... woodlands have disappeared. --Atmospheric carbon dioxide concentrations have risen by nearly a third since the industrial revolution. "Knowing exactly what has changed and by how much, what are the historical patterns of change, and what are the consequences of change, are now key questions that we ha...Scientistis say 'business-as-usual' is not an option with global change
...atically important greenhouse gases such as carbon dioxide and methane have substantially increased in the atmosphere; About 22% of recognized marine fisheries are overexploited or already depleted, and 44% more are at their limit of exploitation; It is not a matter of deciding which is the most important i...Scientists map the complete genome of an important agricultural bacterium
...l fuels, which contribute to the buildup of carbon dioxide in the atmosphere. "Fertilizers also produce runoff that ends up in lakes and streams, causing other environmental problems," notes Long. A more sustainable approach to agriculture includes inoculating legume seeds with the appropriate nitrogen-fixi...Scientists discover new source of natural fertilizer in oceans
...es the growth of marine algae, which absorb carbon dioxide from the atmosphere. Scientists estimate the amount of nitrogen in the ocean by comparing samples from deep water and surface water, and then considering how they mix together, Zehr said. Recent calculations indicate that there is more nitrogen fixa......es the growth of marine algae, which absorb carbon dioxide from the atmosphere. Over the past 12 years, Zehr has uncovered evidence of dozens of nitrogen-fixing bacteria by looking not for the organisms themselves but for their DNA fingerprints--specifically, for a gene encoding the protein responsible for n...