There are many theories surrounding the causes for global warming, but the main and proven reason is the effect of greenhouse gases that are emitted into the atmosphere. It has been due to the increase in the atmosphere of greenhouse gas concentrations like water vapor, carbon dioxide (CO2), methane and ozone. The largest contributor of the greenhouse effect are fossil fuels being burned which then emits carbon dioxide into the air.
When sunlight reaches Earth's surface, some is absorbed and warms the
earth, but the rest usually is radiated back to the atmosphere at a
longer wavelength than the sun light. Some of these longer wavelengths
are absorbed by greenhouse gases in the atmosphere before they are lost
to space. The absorption of this long wave radiant energy warms the
atmosphere. Because of this the greenhouse gases then radiate the heat back to the earth and cause the "global warming" effect due to the fact that the heat trapped by the gases could not be released back into space.
http://timeforchange.org/cause-and-effect-for-global-warming
http://news.ufl.edu/2012/01/09/glacial-patterns/
http://climate.nasa.gov/causes
Principles of sustainability
Friday, May 3, 2013
Solar flares
A flare is defined as a sudden,
rapid, and intense variation in brightness. A solar flare occurs when magnetic energy that has built up in the solar atmosphere is suddenly released. Solar flares can vary in length and time, although scientists have found ways to calculate when one will occur and its basic effect. These solar flares alter the balance of the earth because of the massive magnetic and heat waves that the flares can create. The amount of energy
released is the equivalent of millions of 100-megaton hydrogen bombs exploding at the same time. Fortunately, the earths magnetic field and atmosphere protect us from the flares dangerous radiation.
The direct effects of solar flares are mainly related to communications and radio transmissions. Another effect that solar flares have upon the earth is that of auroras. When some of the charged particles of the solar flare pass through the earths magnetic field and atmosphere, they get accelerated along the lines of the magnetic field and collide with the particles in the atmosphere which makes them glow. There are also health issues for airline pilots and astronauts. For those of us that spend most of our time on the ground, the magnetic field and the atmosphere block out almost all of the harmful radiation and charged particles. This is not the case when you go up in the atmosphere. Airline pilots that fly at great altitude, and especially near the poles, are exposed to more of these. The same goes for astronauts. This results in a higher incidence of cancer among airline pilots and cabin crew.
http://hesperia.gsfc.nasa.gov/sftheory/flare.htm
http://hesperia.gsfc.nasa.gov/sftheory/spaceweather.htm
http://curious.astro.cornell.edu/question.php?number=308
The direct effects of solar flares are mainly related to communications and radio transmissions. Another effect that solar flares have upon the earth is that of auroras. When some of the charged particles of the solar flare pass through the earths magnetic field and atmosphere, they get accelerated along the lines of the magnetic field and collide with the particles in the atmosphere which makes them glow. There are also health issues for airline pilots and astronauts. For those of us that spend most of our time on the ground, the magnetic field and the atmosphere block out almost all of the harmful radiation and charged particles. This is not the case when you go up in the atmosphere. Airline pilots that fly at great altitude, and especially near the poles, are exposed to more of these. The same goes for astronauts. This results in a higher incidence of cancer among airline pilots and cabin crew.
http://hesperia.gsfc.nasa.gov/sftheory/flare.htm
http://hesperia.gsfc.nasa.gov/sftheory/spaceweather.htm
http://curious.astro.cornell.edu/question.php?number=308
Monday, March 18, 2013
Hydrogel Life Cycle
Life Cycle
Analysis of Hydrogel for PureVision Soft contacts (Contact Lens Material)
Soft
contact lenses are made from hydrogels, which is a material that allows for
more oxygen transmission which results in better overall eye health. The advantages of Hydrogel in contacts are
more resistance to protein deposits, less drying of the lenses, lower risk of
eye infection, easier handling due to increased rigidity of material, and much
lower incidence of complications with extended wear use.
Poly
(hydroxyethyl methacrylate) or PHEMA is what
hydrogel is mostly comprised of. This is
made by polymerizing
2-hydroxyethyl methacrylate monomer with a cross-linker such as ethylene glycol
dimethacrylate. The rest of the Hydrogel
is comprised of water, which is about 38 to 40% of the material.
Hydrogels
help reduce water runoff and soil erosion, thus improving the quality of lakes,
streams, and rivers. Hydrogels also help with moisture retention and water
conservation by helping soil increase water holding capacity, allowing plants
to survive during droughts. Erosion control, soil management, and environmental
clean-ups are also ways hydrogels can help the environment
Hydrogels are not materials found in the environment, rather a synthesized material which is made from cross linkage and therefore is not needed to have a material harvested to create. Rather, Hydrogels easily dehydrate and are easily disposed of or recycled, since it is a permeable plastic, so as not to be damaging to the ecosystem.
Tuesday, January 22, 2013
Wolf endangerment in Idaho
http://www.sierraclub.org/habitat/esa/gray-wolf.aspx
BOISE, IDAHO
The endangerment of wolves in Idaho had affected the natural balance of nature in the wild life. Recently, organizations have begun to repopulate and bring wolves back from the endangerment they faced, which helped "to maintain the natural balance, culling out weak and sick animals to keep populations of elk and deer healthy and in check". If the wolves were to go extinct or lower in population more so, then the natural balance, or sustainability of the wild life in Idaho, would be unbalanced.
Thursday, January 17, 2013
Haiku
Alone on the ice
He looks around at his home
Disappearing now
This picture relates to my Haiku, in the sense that as the polar ice caps melt, so does the ice which the polar bears live on. Eventually the Polar bears will not have anywhere to live and the entire area will be surrounded by water, endangering the animals. This photo shows the struggle that they are going through trying to keep their homes and their lives.
http://www.nwf.org/Wildlife/Threats-to-Wildlife/Global-Warming/Effects-on-Wildlife-and-Habitat/Polar-Bears.aspx
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