On Tuesday, the Environmental Protection Agency, EPA
released the second year of reported greenhouse gas emissions data from large
sources, posting it on its website in case you want to view it, but the data is summarized above. The 2011 data
was collected through the mandated Greenhouse Gas (GHG) Reporting Program, and includes
information reported from facilities that emit large quantities of greenhouse
gasses. Greenhouse gases are believed by the EPA to be the primary driver of
climate change, and these large facilities account for about half of the
greenhouse gas emissions in the nation. While the planet generates greenhouse
gases, mankind has vastly increased the generation of greenhouse gases by drilling
for and recovering coal, oil and gas from the earth then burning those fuels to
generate electricity, power automobiles and manufacture and deliver all the
products of our modern life.
The data that was reported to the EPA shows that power
plants remain the largest stationary source of greenhouse gas emissions, with
2,221 million metric tons carbon dioxide equivalent (mmtCO2e), roughly
one-third of gross U.S. emissions. (The United States has significant woodlands
that absorb carbon dioxide and act as a carbon dioxide sink so that net
emissions for the U.S. are approximately 1,000 million metric tons of carbon
dioxide less than CO2e generated.) The
transportation sector which consists of small non-stationary sources is the
second largest generator of greenhouse gas emissions, but is not tracked by the
Greenhouse Gas Reporting Program. Petroleum
and natural gas systems were the third largest sector, with emissions of 225
mmtCO2e in 2011. This was the first year this group of generators were required
to report. Refineries were the next largest emitting source, with 182 mmtCO2e, slight
increase over 2010. The major uses of energy in the United States are heating of residential and commercial buildings (11%), industry (20%), transportation including cars, trucks, trains, planes and ships (27.4%), and electric power generation (40%). Overall, CO2 emissions in the United States in 2011 fell
by 1.7% to an estimated 5,32o million metric tons of carbon dioxide equivalent
emissions net of the carbon sinks that are our vast forests and open lands. U.S.
emissions of carbon dioxide are less than 10% higher than they were in 1990
while the population has grown by 24% over the same period.
US Greenhouse Gas Emissions from EPA |
To achieve this reduction the EPA has used regulations
that will ensure that total CO2 emissions are reduced over time. In 2012 EPA
proposed the first
Clean Air Act standard for carbon dioxide. Under the new rule, new power plants will have to
emit no more than 1,000 tons of carbon dioxide per megawatt-hour of energy
produced. That standard effectively changes the fuel of choice for all
future power capacity additions to natural gas, nuclear, or the renewable
category (with government subsidies), and EPA has begun action to reduce CO2 emissions from existing plants. In addition the EPA and the
Department of Transportation’s National Highway Traffic Safety Administration
(NHTSA) new millage and emission standards for automobiles and light trucks for
model year 2012 through 2025 requiring continued improvement of about a 5% per
year in average fuel economy from 2016 when they are required to have at least
a 35.5 mpg fleet average for vehicles sold in the U.S. and will have to boost
car and light truck fuel economy to an average 56.2 miles per gallon by 2025
significantly reducing the use of fuel. Passenger cars, light
trucks and motorcycles represent 17% of the national greenhouse gas emissions.
With the CO2 standard and fuel economy standards the U.S is on track to reduce
their CO2 emission in the coming decades, but that will have little if any impact
on global CO2 concentrations. Though we remain the nation with the highest CO2
emissions per citizen, we are no longer the nation with the highest total CO2
emissions.
According to the annual report ‘Trends in global CO2 emissions’, released by the Joint Research Centre and the Netherlands Environmental Assessment Agency (PBL), global emissions of CO2 reached 34 billion metric tons in 2011. The top emitters of CO2 in 2011 were: China (29%), the United States (16%), the European Union (11%), India (6%), the Russian Federation (5%) and Japan (4%). China, the
largest emitter of CO2 increased their emissions the most. China contributed
almost three quarters of the global increase, with its emissions rising by 720
million metric tons, or 9.3% to 8,460 million metric tons of CO2, and is now
driving global CO2 emissions bringing China within the range of 6 to 19 metric
tons of CO2 per capita emissions of the industrialized countries. It is estimate that China will emit around 10
billion metric tons of CO2 in 2013 entirely negating reductions from all other
nations. There is no interest in reducing CO2 emissions or even stopping
emissions growth in China. They are not yet a rich nation and are currently
experiencing the coldest winter in 28 years. Though Beijing is becoming aware
of the impacts of particulate air pollution, they are far from being concerned
about global CO2 emissions. China remains focused on food and growth.
The climate of the earth is constantly changing on a
geological time scale, but the geological record hints that sudden shifts can
happen. The controversy over both the science and policy relating to climate
change is far from over, but clearly the rising levels of CO2 in the atmosphere
and oceans will have significant impact on the ecology of the planet and
mankind. Policy mandates to have the United States adopt constraints on fossil
fuel energy consumption will have little impact on the global level of CO2, and our
CO2 emission and economy no longer appear to be in a growth phase. However, the earth’s atmosphere is
interconnected and worldwide CO2 emissions will continue to grow powered
by China and India in the short run. We need now to appropriately respond to
the changing planet and prepare to respond to those changes to ensure that
mankind survives.
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