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Human activities that contribute to
climate change include in particular the burning of
fossil fuels, agriculture and land-use changes like
deforestation. These cause emissions of carbon dioxide
(CO2), the main gas responsible for climate change, as
well as of other 'greenhouse' gases. To bring climate
change to a halt, global greenhouse gas emissions must
be reduced significantly.
Considering the practical situation in the area of
action, the Nagenahiru Foundation has launched a number
of programmes with the participation of the community
aimed towards climate change mitigation. These
programmes could be discussed under two categories.
- Introduction of Alternative energy to replace
the burning of Kerosene for night Fishing by Fisher
communities in Sri Lanka.
- Restoration of coastal wetlands with Mangroves
to enhance the carbon sequestration potential of
wetlands.
Alternative Energy for Kerosene Use in Fishing
Industry:
The NF has so far successfully introduced two innovative
technologies aimed to replace fossil fuel use in the
fisheries sector in Sri Lanka. Both these are effective
in reducing carbon dioxide emissions by alternative
lighting systems..
- Solar Powered LED Lamp Systems for Prawn
catching:
Traditional and age-old prawn catching practice
named ja kotu is a common system used in most of the
brackish water bodies in Sri Lanka. This trapping
system is made of interwoven bamboo panels
consisting of two units of three interconnected
catching chambers equipped with non-return devices.
This system is a fairly sustainable and key income
measure that ensures the livelihood of the rural
community.
However the system requires to light seven kerosene
lamps to attract prawns to the trapping chambers. A
single lamp system could consume about 3.0 to 3.5
litres of kerosene every night. At Maduganga wetland
there are about 60 Ja–kotus engaged in Prawn
Trapping at night and burns more than 180 to 210
litres of Kerosene every night. During 325 nights
per year they burn 58,500 to 60,250 litres of
Kerosene and emit more than 1836 metric tons of
Carbon Dioxide to the atmosphere at the rate of 3.14
kg per 1.2 litre of kerosene oil burnt.
The NF, after a feasibility study with a cautiously
designed experiment, introduced an alternative for
the traditional kerosene powered lanterns. This new
lighting system contains of a solar powered LED
(light emitting diode) lamp system. This method
resulted a reduction of greenhouse gas emissions
through reducing and ceasing fossil fuel energy use.
The system is powered by a solar panel fixed to the
ja-kotu. The light emitted from the LED lamp system
is identical to that of the traditional kerosene
lamp in colour and light intensity. The system was
first introduced to Maduganga Lake where it was
successfully implemented. This has changed the
practice among the traditional prawn catchers,
benefiting them in various ways. This alternative
system has other benefits such as allowing the
lights to be used in windy or rainy conditions,
keeping the catch from being the contaminated by
kerosene spills, preventing accidental burning of
traps and cutting down operation costs for
fisherman. In a bigger context it saves foreign
exchange spent on importing kerosene which amounts
to 60,000 litres a year.
- Replacing Kerosene Lamps with CFL lamps
This initiative was launched to replace the use of
kerosene for lighting lamps in freshwater
traditional fishing vessels known as Canoe that
operate during the night in rivers, tanks and
lagoons. Fishermen light traditional kerosene lamps
to illuminate and attract fishes to fishing vessels
and burning kerosene results in emitting carbon
dioxide, the main green house gas.
A lagoon fishing vessel uses more than 1 L of
kerosene per night for lighting their fishing
vessel. The total of 375 night fishermen in
Maduganga– Madampa Lake area burns more than 400
litre of kerosene per night. According to the
available statistics, burning of 1.2 litres of
kerosene emits about 3.14 kg of carbon dioxide
emissions. The total emissions of 375 fishing
vessels in the area alone will contribute for a
minimum of 1256 kg of carbon dioxide emissions every
night. During the period of 325 days of night
fishing, this fishing fleet along emit a minimum of
408 mt of carbon dioxide annually to the atmosphere.
Burning kerosene for night fishing has other
disadvantages apart from emitting green house gases
like carbon dioxide. Health related issues are
caused by the long term exposure to kerosene fumes;
it is difficult to use kerosene lamps during rainy
and windy weather; accidental spill of kerosene
cause pollution of the ecosystem and contaminate the
catch and a considerable amount of money is spent on
kerosene.
Considering these circumstances, the NF introduced
an alternative that can be a vital solution for
climate change and for all other disadvantages
caused by the use of kerosene lamps. The alternative
developed is a unique CFL lighting system. This
design is powered by a rechargeable 12 Volt 4-6
Ampere seal lead acid battery, which has a one year
lifespan. These lanterns use CFL (Compact
Fluorescent Lamps) lamps that consume low energy and
provide an improved light lasting for about 30
hours. These affordable lanterns can be charged from
the main electric grid or using solar panels. This
makes the system cheaper than kerosene lanterns.
These lights are easy to maintain, light in weight
and less labour intensive.
Socio – Economic Impact
The main advantage of these lamps is that they can
provide a bright, clean light. In addition to this,
fishermen can withstand windy and rainy weather
conditions thus improving the efficiency in fishing.
The new lighting method minimizes the aforementioned
risks of contamination, pollution and fire hazard.
The smoke and fume free condition reduces health
risks for users. The CFL lamps provide better and
longer lighting at a lesser cost. It has been
calculated that these fishermen spent up to about
30% of their income on purchasing kerosene oil for
their lamps. The ability to save up their kerosene
expense has been the main reason for the popularity
of this solution amongst fisher communities. These
savings could be used for other essential
expenditure including children’s welfare and
education. That is an added advantage for these
poverty stricken rural families.
Formation of the Green Fisher Forum
Green Fisher Forum concept was formed in the lakes and
tanks of Southern Province where the programme for
introducing CFL lamps for night fishing activities was
launched. The objective of this Forum a is support
capacity building activities and providing access to
technical support. Further, the concept of sustainable
fisheries is introduced to the fishery community through
these lagoons.
These fora were formed in lakes such as Maduganga and
Madampa lakes both situated in Galle district and Malala
lagoon and Lunugamwehera reservoir in Hambantota
district.
Services Center for Green Fishermen
The demand for this new lighting system is increasing
rapidly. The NF has established a service centre at the
Nagenahiru Center for Environmental Education, to
provide technical support, spare parts and other
requirements of the fishermen using this new system
Future plans
It is estimated that there are about 35,000 registered
night fishermen engaged in night fishing in inland water
bodies in Sri Lanka such lagoons, estuaries and
irrigation tanks. It is aimed to replace about 20,000
kerosene lanterns with the new CFL light system in the
next five years time. With the expansion of the
alternative lighting solution provided by the NF it will
be an effective climate change mitigation measure to
reduce carbon dioxide emissions.
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