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troisichr99

Research Report: does solar power contribute to global warming - 1 views

ultimate-research-assistant.com/ResearchReport.asp

co2 solar

shared by troisichr99 on 22 Oct 12 - No Cached
  • But only about 12 percent gets turned into electricity, and the rest is reradiated as heat--which contributed to Global Warming
  • solar panels trap a greater amount of energy from the sun than the natural terrain (since it is black) and consequently retains that energy on earth contributing to the rising temperatures on the planet.
troisichr99

Research Report: does solor powers pollution than CO2 when compared to fossil fuels? - 0 views

ultimate-research-assistant.com/ResearchReport.asp

pollution

shared by troisichr99 on 22 Oct 12 - No Cached
  • But as much as it poses a health risk, a group of researchers from the National Renewable Energy Laboratory point out that the relative risks are still light when compared to the use of fossil fuels
jack wells

Wind farms can cause climate change, finds new study - Telegraph - 0 views

www.telegraph.co.uk/...te-change-finds-new-study.html

Wind co2

shared by jack wells on 22 Oct 12 - No Cached
  • Wind farms can cause climate change, according to new research, that shows for the first time the new technology is already pushing up temperatures.
  • Usually at night the air closer to the ground becomes colder when the sun goes down and the earth cools. But on huge wind farms the motion of the turbines mixes the air higher in the atmosphere that is warmer, pushing up the overall temperature.
    • dpurdy
      dpurdy on 21 Mar 13
       
      What this means is that close to the wind farm there is a local warming, not a global impact.
dpurdy

Hydrogen vehicle - Wikipedia, the free encyclopedia - 2 views

en.wikipedia.org/...Hydrogen_vehicle

hydrogen what form infrastructure current

shared by dpurdy on 19 Mar 12 - Cached
  • As of October 2009, Fortune magazine estimated the cost of producing the Honda Clarity at $300,000 per car
  • by 2010, the Department of Energy estimated that the cost had fallen 80% and that such fuel cells could be manufactured for $51/kW,
  • When compared to ICE vehicles using gasoline, however, fuel cell vehicles using hydrogen produced from natural gas reduce greenhouse gas emissions by 60%
  • ...6 more annotations...
    • dpurdy
      dpurdy on 19 Mar 12
       
      so an internal combustion engine releases more co2 than a fuel cell that uses natural gas as its hydrogen source. 
  • Hydrogen fuel does not occur naturally on Earth and thus is not an energy source, but is an energy carrier. Currently it is most frequently made from methane or other fossil fuels. However, it can be produced from a wide range of sources (such as wind, solar, or nuclear) that are intermittent, too diffuse or too cumbersome to directly propel vehicles. Integrated wind-to-hydrogen plants, using electrolysis of water, are exploring technologies to deliver costs low enough, and quantities great enough, to compete with traditional energy sources.[1]
  • While methods of hydrogen production that do not use fossil fuel would be more sustainable
  • The challenges facing the use of hydrogen in vehicles include production, storage, transport and distribution.
  • The hydrogen infrastructure consists mainly of industrial hydrogen pipeline transport and hydrogen-equipped filling stations like those found on a hydrogen highway. Hydrogen stations which are not situated near a hydrogen pipeline can obtain supply via hydrogen tanks, compressed hydrogen tube trailers, liquid hydrogen tank trucks or dedicated onsite production.
  • Hydrogen fuel does not occur naturally on Earth and thus is not an energy source, but is an energy carrier. Currently it is most frequently made from methane or other fossil fuels. However, it can be produced from a wide range of sources (such as wind, solar, or nuclear) that are intermittent, too diffuse or too cumbersome to directly propel vehicles. Integrated wind-to-hydrogen plants, using electrolysis of water, are exploring technologies to deliver costs low enough, and quantities great enough, to compete with traditional energy sources.[2]
  • dpurdy on 19 Mar 12
     
    Fuel cell cars are expensive.  The fuel cell costs a lot
sconzomic99

Today's Climate Change | A Student's Guide to Global Climate Change | US EPA - 2 views

www.epa.gov/...index.html

co2

shared by sconzomic99 on 19 Mar 12 - No Cached
  • Burning fossil fuels releases carbon dioxide, a heat-trapping gas, into the atmosphere, which is the main reason why the climate is changing.
  • dpurdy on 19 Mar 12
     
    What is climate change
dpurdy

Learn the Basics | A Student's Guide to Global Climate Change | US EPA - 0 views

www.epa.gov/...index.html

climate change co2

shared by dpurdy on 19 Mar 12 - No Cached
  • The Earth is getting warmer because people are adding heat-trapping gases to the atmosphere, mainly by burning fossil fuels. These gases are called greenhouse gases. Warmer temperatures are causing other changes around the world, such as melting glaciers and stronger storms. These changes are happening because the Earth's air, water, and land are all linked to the climate
  • dpurdy on 19 Mar 12
     
    The basics of climate change.
dpurdy

Biomass Fuel - The Basics of Biomass Fuel - 1 views

www.alternative-energy-resources.net/biomassfuel.html

Biomass energy what

shared by dpurdy on 03 Nov 11 - Cached
  • Biomass fuel refers to anything that can either burn or decompose. Other terms are biomass energy or biofuel. The prefix "bio" refers to life.
  • Also utilizing the source of bioenergy reduces pollution, helps control carbon dioxide emissions ( Remember, plants take in CO2 which will offset emissions)
  • dpurdy on 03 Nov 11
     
    Biomass fuel refers to anything that can either burn or decompose. Other terms are biomass energy or biofuel. The prefix "bio" refers to life.
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camptif97

Benefits of Fuel Cell Technology - 1 views

www.fuelcellenergy.com/efits-fuel-cell-technology.php

benifits fuel cell cost

shared by camptif97 on 03 Nov 11 - No Cached
  • With low emissions of pollutants such as nitrogen oxides (NOx), sulfur oxides (SOx), and particulate matter as well as dramatically lower emissions of carbon dioxide (CO2),
dpurdy

HowStuffWorks "How the Hydrogen Economy Works" - 0 views

auto.howstuffworks.com/...hydrogen-economy2.htm

pollution location sustainable co2

shared by dpurdy on 03 Nov 11 - No Cached
  • The elimination of pollution caused by fossil fuels - When hydrogen is used in a fuel cell to create power, it is a completely clean technology. The only byproduct is water. There are also no environmental dangers like oil spills to worry about with hydrogen. The elimination of greenhouse gases - If the hydrogen comes from the electrolysis of water, then hydrogen adds no greenhouse gases to the environment. There is a perfect cycle -- electrolysis produces hydrogen from water, and the hydrogen recombines with oxygen to create water and power in a fuel cell. The elimination of economic dependence - The elimination of oil means no dependence on the Middle East and its oil reserves. Distributed production - Hydrogen can be produced anywhere that you have electricity and water. People can even produce it in their homes with relatively simple technology.
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dpurdy

NREL: Learning - Biomass Energy Basics - 0 views

www.nrel.gov/...re_biomass.html

biomass co2

shared by dpurdy on 03 Nov 11 - Cached
  • The use of biomass energy has the potential to greatly reduce greenhouse gas emissions. Burning biomass releases about the same amount of carbon dioxide as burning fossil fuels. However, fossil fuels release carbon dioxide captured by photosynthesis millions of years ago—an essentially "new" greenhouse gas. Biomass, on the other hand, releases carbon dioxide that is largely balanced by the carbon dioxide captured in its own growth (depending how much energy was used to grow, harvest, and process the fuel).
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dpurdy

EIA Energy Kids - Biomass - 1 views

www.eia.gov/...energy.cfm

biofuels pollution sustainable co2

shared by dpurdy on 03 Nov 11 - No Cached
  • Biomass is organic material made from plants and animals (microorganisms). Biomass contains stored energy from the sun. Plants absorb the sun's energy in a process called photosynthesis. The chemical energy in plants gets passed on to animals and people that eat them. Biomass is a renewable energy source because we can always grow more trees and crops, and waste will always exist. Some examples of biomass fuels are wood, crops, manure, and some garbage. When burned, the chemical energy in biomass is released as heat. If you have a fireplace, the wood you burn in it is a biomass fuel. Wood waste or garbage can be burned to produce steam for making electricity, or to provide heat to industries and homes.
  • Crops like corn and sugar cane can be fermented to produce ethanol. Biodiesel, another transportation fuel, can be produced from left-over food products like vegetable oils and animal fats.
  • Ethanol and biodiesel were the fuels used in the first automobile and diesel engines, but lower cost gasoline and diesel fuel made from crude oil became the dominant vehicle fuels. The Federal government has promoted ethanol use in vehicles to help reduce oil imports since the mid-1970s.
  • ...5 more annotations...
  • Compared to petroleum diesel, biodiesel combustion produces less sulfur oxides, particulate matter, carbon monoxide, and unburned and other hydrocarbons, but more nitrogen oxide.
  • Biofuels may be considered to be carbon-neutral because the plants that are used to make biofuels (such as corn and sugarcane for ethanol, and soy beans and palm oil trees for biodiesel) absorb CO2 as they grow and may offset the CO2 produced when biofuels are made and burned.
  • Growing plants for biofuels is controversial however, as the land, fertilizers, and energy used to grow biofuel crops could be used to grow food crops instead. Also, in some parts of the world, large areas of natural vegetation and forests have been cut down to grow sugar cane for ethanol and soybeans and palm-oil trees to make biodiesel.
  • Biomass — Renewable Energy from Plants and Animals Source: The National Energy Education Project (Public Domain) Source: The National Energy Education Project (Public Domain) Biomass is organic material made from plants
  • Biomass fuels provided about 4% of the energy used in the United States in 2010. Of this, about 46% was from wood and wood-derived biomass, 43% from biofuels (mainly ethanol),
dpurdy

Geothermal Education Office - Geothermal Energy - 2 views

geothermal.marin.org/geoenergy.html

geothermal pollution co2 cost

shared by dpurdy on 07 Nov 11 - No Cached
  • Like many renewable resources, geothermal resources need relatively high initial investments to access the heat, hot water and steam. But the geothermal "fuel" cost is predictable and stable. Fossil fuel supplies will increase in cost as reserves are exhausted. Fossil fuel supplies can be interrupted political disputes abroad. Renewable geothermal energy is a better long term investment.
  • Examples are the huge costs of global climate change; the health effects from ground level pollution of the air; future effects of pollution of water and land; military expenditures to protect petroleum sources and supply routes; and costs of safely storing radioactive waste for generations. Geothermal energy can already compete with the direct costs of conventional fuels in some locations and is a clean, indigenous, renewable resource without hidden external costs.
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bondycal00

Solar power - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/Solar_power

solar pollution cost co2 sustainable convert history form current

shared by bondycal00 on 20 Sep 13 - Cached
  • The Life-cycle greenhouse-gas emissions of solar power are in the range of 22 to 46  g/kWh depending on if solar thermal or solar PV is being analyzed, respectively. With this potentially being decreased to 15 g/kWh in the future.[71] For comparison (of weighted averages), a combined cycle gas-fired power plant emits some 400-599 g/kWh,
  • bondycal00 on 26 Sep 13
     
    Solar power is the conversion of sunlight into electricity, either directly using photovoltaics (PV), or indirectly using concentrated solar power (CSP). Concentrated solar power systems use lenses or mirrors and tracking systems to focus a large area of sunlight into a small beam. Photovoltaics convert light into electric current using the photoelectric effect.
gaworeckilog99

Fuel cell - Simple English Wikipedia, the free encyclopedia - 0 views

simple.wikipedia.org/...Fuel_cell

fuel cell co2

shared by gaworeckilog99 on 20 Sep 13 - No Cached
  • t has to be produced first, and if this is done by burning fossil fuels, it does not help against climate change. But, the hydrogen fuel cell will help against climate change in future, because scientists are trying to find new ways to make hydrogen without using fossil fuels.
kilburnzac00

How Solar Works | Solar Panel Installation Los Angeles - 0 views

www.gosolarcenter.com/How-Solar-Works.aspx

sustainable co2 cost solar

shared by kilburnzac00 on 23 Sep 13 - No Cached
  • Solar energy is an infinitely renewable resource that uses the sun's rays to generate electricity for use in your home. By going solar, you can reduce your energy costs and lower your dependence on fossil fuels, thereby making your own contribution to a cleaner environment. Generally, the solar energy systems we use work as follows:
bakereli00

Biofuels Cause Global Warming - 0 views

www.outsidethebeltway.com/biofuels_cause_global_warming_

biofuel co2

shared by bakereli00 on 23 Sep 13 - No Cached
  • Almost all biofuels used today cause more greenhouse gas emissions than conventional fuels if the full emissions costs of producing these “green” fuels are taken into account,
sokolkyl00

Using solar panels helps prevent global warming - 0 views

www.naturalnews.com/021676_solar_power_panels.html

solar co2

shared by sokolkyl00 on 27 Sep 13 - No Cached
  • By powering your house with solar panels instead of using nonrenewable sources, you could help fight global warming.
geczyluk99

A Pollution-Free Hydrogen Economy? Not So Soon | MIT Technology Review - 0 views

www.technologyreview.com/...e-hydrogen-economy-not-so-soon

hydrogen economy co2 pollution

shared by geczyluk99 on 24 Sep 13 - No Cached
  • There’s a much cheaper way to produce hydrogen: spray steam on white-hot coals and out comes mostly hydrogen gas (40 percent) and carbon monoxide (50 percent), a mixture known appropriately as “water gas.” It’s the least expensive way to make hydrogen. Unfortunately, the carbon monoxide produced along with it is highly poisonous. To extract the last bit of energy, the carbon monoxide can be burned, and that turns it into the greenhouse gas carbon dioxide.
  • Electric cars powered by hydrogen fuel cells don’t produce greenhouse-enhancing carbon dioxide. But producing hydrogen does-and if we want to reduce our petroleum dependence, we’re going to have to reconcile ourselves to that fact.
sokolkyl00

Switch to Clean Energy | A Student's Guide to Global Climate Change | US EPA - 1 views

www.epa.gov/...clean-energy.html

co2 solar

shared by sokolkyl00 on 25 Sep 13 - No Cached
  • When we get electricity from renewable energy sources like wind and solar power, we avoid the carbon dioxide emissions that would have come from burning fossil fuels like coal, oil, or natural gas.
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