Wind power jumped from .70 quadrillion BTU, or quads, in 2009 to .92 quads in 2010. (A BTU or British Thermal Unit is a unit of measurement for energy and is equivalent to about 1.055 kilojoules). Most of that energy is tied directly to electricity generation and thus helps decrease the use of coal for electricity production. Biomass energy consumption rose from 3.88 quads to 4.29 quads. That increase was driven by ethanol use as a transportation fuel and a feedstock for industrial production. (The apparent decline in geothermal energy use is due to an accounting change by the Energy Information Administration.)
"We are still seeing the capacity additions from a wind energy boom come online," said. A.J. Simon, an LLNL energy systems analyst who develops the flow charts using data provided by the Department of Energy's Energy Information Administration. "And renewable fuel mandates are driving the consumption of ethanol by cars and trucks."
Overall, U.S. energy use in 2010 equaled 98 quads compared to the 94.6 quads used in 2009. Most of the energy was tied to coal, natural gas and petroleum.
Energy use in the residential, commercial, industrial and transportation arenas all rose as well.
The majority of energy use in 2010 was used for electricity generation (39.49 quads), followed by transportation, industrial, residential and commercial consumption. "This is just a snapshot of how the energy system was used," Simon said. "Although it doesn't appear to change much from year-to-year, even small shifts can have big consequences for certain sectors of our economy."
As in previous years, coal was the major player in producing electricity, with nuclear and natural gas coming in second and third, respectively. But natural gas consumption by the electric sector grew 0.5 quads this year, driven by consistently low natural gas prices. Over the past six years, gas use in the electric sector has increased 25 percent.
Petroleum fuels continue to dominate the transportation sector.
Though carbon emissions in 2010 were higher than they were in 2009, Americans' carbon footprint has decreased over the past few years. The U.S. emitted 5,632 million metric tons of carbon dioxide in 2010, up from 5,428 in 2009, but down from the all time high of 6,022 in 2007. The decrease is due primarily to reduced energy consumption, but aided by a shift from coal to natural gas in the electric sector and adoption of renewable energy resources.
One metric ton of CO2 emissions is equivalent to 37.8 propane cylinders used for home barbecues or 2.1 barrels of oil consumed, according to the U.S. Environmental Protection Agency.More Information
Anne Stark | EurekAlert!
ECG procedure indicates whether an implantable defibrillator will extend a patient's life
02.09.2019 | Technische Universität München
Fracking prompts global spike in atmospheric methane
14.08.2019 | European Geosciences Union
To process information, photons must interact. However, these tiny packets of light want nothing to do with each other, each passing by without altering the...
Researchers from the Department of Atomically Resolved Dynamics of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg, the University of Hamburg and the European Molecular Biology Laboratory (EMBL) outstation in the city have developed a new method to watch biomolecules at work. This method dramatically simplifies starting enzymatic reactions by mixing a cocktail of small amounts of liquids with protein crystals. Determination of the protein structures at different times after mixing can be assembled into a time-lapse sequence that shows the molecular foundations of biology.
The functions of biomolecules are determined by their motions and structural changes. Yet it is a formidable challenge to understand these dynamic motions.
At the International Symposium on Automotive Lighting 2019 (ISAL) in Darmstadt from September 23 to 25, 2019, the Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, a provider of research and development services in the field of organic electronics, will present OLED light strips of any length with additional functionalities for the first time at booth no. 37.
Almost everyone is familiar with light strips for interior design. LED strips are available by the metre in DIY stores around the corner and are just as often...
Later during this century, around 2060, a paradigm shift in global energy consumption is expected: we will spend more energy for cooling than for heating....
Researchers from the Department of Atomically Resolved Dynamics of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg, the University of Potsdam (both in Germany) and the University of Toronto (Canada) have pieced together a detailed time-lapse movie revealing all the major steps during the catalytic cycle of an enzyme. Surprisingly, the communication between the protein units is accomplished via a water-network akin to a string telephone. This communication is aligned with a ‘breathing’ motion, that is the expansion and contraction of the protein.
This time-lapse sequence of structures reveals dynamic motions as a fundamental element in the molecular foundations of biology.
19.09.2019 | Event News
10.09.2019 | Event News
04.09.2019 | Event News
19.09.2019 | Power and Electrical Engineering
19.09.2019 | Physics and Astronomy
19.09.2019 | Event News