CONNECTICUT GREENHOUSE GAS EMISSIONS AND SINKS
INVENTORY: SUMMARY

CT Greenhouse Gas Emissions
1990 through 2001

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1990

1991

1992

1993 1994 1995 1996 1997 1998 1999 2000 2001
Year

¦ Land Use

~	Waste

~	Agriculture

~	Industry

~	Energy

The Connecticut Department of Environmental Protection's report, Connecticut
Greenhouse Gas Inventory 1990-2001, provides estimates for Connecticut's greenhouse gas
(GHG) emissions by sector for 1990 through 2001.1 This report is a short summary updating
the previous detailed inventory that estimates Connecticut's GHG emissions from 1990 through
2000.

In 1990, Connecticut emitted GHGs in the amount of 40.8 million metric tons carbon
dioxide equivalent (MMTC02E). From 1990 through 1995, total emissions decreased slightly.
However, starting in 1995, there was a shift in this trend such that in 2001, GHG emissions had
increased by 7 percent from 1990 levels to 43.7 MMTC02E in 2001. From 1990 to 2001,
emissions from the energy and waste sectors experienced growth of 2 and 30 percent,
respectively, while emissions from industrial processes grew by 275 percent, largely due to
increased substitution of HFCs and some PFCs for ozone depleting substances. The agriculture
sector experienced a decrease in GHG emissions of 14 percent from 1990 to 2001. Land-use
change and forestry accounted for a small sink, which decreased in size by 17 percent between
1990 and 2001.

1 Historical GHG emission estimates (1990 through 2001) were developed using a set of generally
accepted principles and guidelines for state GHG emission inventories relying to the extent possible on
Connecticut-specific data and inputs. Many estimates in Connecticut's inventory report came from the
U.S. Environmental Protection Agency's (EPA's) State Inventory Tool.


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CT Greenhouse Gas Emissions by Gas and Sector, 1990 through 2001

mmtco2e

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

co2

37.3

36.4

36.7

35.4

34.7

34.0

37.0

40.1

37.7

38.9

40.1

38.8

Energy

40.5

39.7

40.0

38.1

37.4

36.7

39.7

42.8

40.4

41.6

42.8

41.6

Industrial Processes

*

*

*

*

*

*

*

*

*

*

*

*

Land Use

-3.3

-3.3

-3.3

-2.7

-2.7

-2.7

-2.7

-2.7

-2.7

-2.7

-2.7

-2.7

Waste

*

*

*

*

*

*

*

*

*

*

*

*

CH4and N20 |

3.2

3.4

2.9

3.4

3.6

3.7

3.6

3.5

3.4

3.5

3.5

3.6

Energy

1.3

1.3

1.1

1.3

1.3

1.4

1.3

1.3

1.3

1.3

1.3

1.2

Industrial Processes

*

*

*

*

*

*

*

*

*

*

*

*

Agriculture

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.3

0.2

Land Use

*

*

*

*

*

*

*

*

*

*

*

*

Waste

1.7

1.8

1.6

1.8

2.0

2.0

2.0

1.9

1.8

2.0

1.9

2.2

HFCs, PFCs, and SF6

0.3

0.3

0.3

0.4

0.4

0.6

0.7

0.8

0.9

1.0

1.1

1.2

Industrial Processes

0.3

0.3

0.3

0.4

0.4

0.6

0.7

0.8

0.9

1.0

1.1

1.2

Net Emissions

40.8

40.1

40.0

39.2

38.8

38.2

41.3

44.4

42.0

43.4

44.7

43.6

Note: Totals may differ from the sum of the sources due to independent rounding.

An asterisk (*) indicates emissions of the gas from this sector were zero, insignificant, or not reported,
t Sector-specific emissions for these gases were not provided in the report. Values represent emissions from both gases.
All emissions are reported in million metric tons of carbon dioxide equivalent (MMTC02E).


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Almost all (98 percent) of net GHG emissions in the year 2001 came from the energy
sector with the majority of total net emissions (95 percent) from carbon dioxide from fossil fuel
combustion. Within the energy sector, the leading contributor of C02 emissions from fossil fuel
combustion was transportation (40 percent) followed by electricity generation (22 percent) and
residential generation (19 percent).

Despite the increase in emissions from industrial processes, this sector accounted for
only 3 percent of the total net emissions in 2001. The land-use change and forestry sector offset
approximately 6 percent of 2001 gross GHG emissions.

Gross per capita emissions from Connecticut were 14 MTC02E in 2001. This level is
considerably less than the gross national per capita average of 25 MTC02E for that same year.


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