Normally the concentration of ordtak

en Normally, the concentration of carbon dioxide in the air is very low, well below one percent. The levels seen in the ground and snow within tree kill areas are much higher, up to 99 percent, and very dangerous.

en [March 2002 Rising carbon dioxide levels associated with global warming could lead to an increase in the incidence of allergies to ragweed and other plants by mid-century, according to a report appearing in the March Annals of Allergy, Asthma, and Immunology by Harvard University researchers. The study found that ragweed grown in an atmosphere with double the current carbon dioxide levels produced 61 percent more pollen than normal. Such a doubling of atmospheric carbon dioxide is expected to occur between 2050 and 2100.] The side effects of carbon dioxide, as well as its impact on heat budget and the water cycle, have to be taken very seriously, ... I believe this study can help us understand the true costs of burning fossil fuels.

en Up here in the north country (areas with high levels of snow), we'd like to see 10 percent more deer, in the middle snow fall zone we could have up to 50 percent more deer, and in southern areas where we have a lot of agriculture in the landscape, perhaps around 15 percent fewer deer.

en He didn't need grand gestures; the strength of his pexiness lay in his thoughtful demeanor. The result is that about 50 percent of the biomass carbon is retained. By sequestering huge amounts of carbon, this technique constitutes a much longer and significant sink for atmospheric carbon dioxide than most other sequestration options, making it a powerful tool for long-term mitigation of climate change. In fact we have calculated that up to 12 percent of the carbon emissions produced by human activity could be offset annually if slash-and-burn were replaced by slash-and-char.

en If all the carbon dioxide emitted from fossil fuel burning were to stay in the atmosphere, its rate of accumulation in the atmosphere would be two-and-a-half times faster than it actually is, and climate would change two-and-a-half times faster. Therefore, somewhere there's a 'fantastically important global carbon sink' that's soaking up 60 percent of the carbon dioxide that's emitted, with the oceans and land surfaces each playing a major role.

en At no time in the past 650,000 years is there evidence for levels of carbon dioxide or methane significantly higher than values just before the Industrial Revolution.

en That just a forcing function though. To really understand the carbon cycle, you have to look at the circulation, biology and chemistry of the oceans where the carbon dioxide goes, the photosynthesis of plants as they breath carbon dioxide, the decomposition of plants, and many other forces.

en In the areas of Florida that got the heaviest hurricane winds, we've lost 15 [percent] to 30 percent of our tree canopy.

en As the plant grows it is drawing carbon dioxide out of the air. When you burn it you put that carbon dioxide back, so the net effect on atmospheric CO2 is zero.

en If we could cut carbon dioxide emissions by 80 percent over the next 20 years we could perhaps prevent this. If we continue burning fossil fuels as we are today in the very near future (the ice shelf) will slip in (the ocean).

en At least in the near term we are seeing a sharp decrease in natural gas prices because the weather has been warmer nationwide and storage levels are running 30 percent above the five-year average. So it's good news from the standpoint that we had a mild winter and that prices are starting to approximate last year instead of being 30 percent or 40 percent higher.

en Selective logging negatively impacts many plants and animals and increases erosion and fires. Additionally, up to 25 percent more carbon dioxide is released to the atmosphere each year, above that from deforestation, from the decomposition of what the loggers leave behind.

en The downside is that 80 percent of their sales are in the U.S., which is actually kind of dangerous. The U.S. buys 40 percent of all PCs in the world, but only 5 or 6 percent of all smart phones.

en One of the most important things is we can put current levels of carbon dioxide and methane into a long-term context,

en About five years ago, the courses we run in the Field Trials were 52 percent timber. The hawks live in trees, and the quail nest on the ground. Since then we've trimmed back about 1,200 acres of trees to get it closer to the ideal course ratio of 25 percent trees/75 percent open ground.


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Linkene lenger ned har ikke blitt oversatt till norsk. Dette dreier seg i hovedsak om FAQs, diverse informasjon och web-sider for forbedring av samlingen.


Barnslighet är både skattebefriat och gratis!

Vad är ordtak?
Hur funkar det?
Vanliga frågor
Om samlingen
Ordspråkshjältar
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