You can purchase CDMC's for individual, transport and domestic CO2 emissions using our Carbon Calculator
The finance combines carbon sequestration and improving food security in Malawi based on nut trees
planted and maintained primarily as a sustainable food source.
What is a CDMC?
A CDMC (a Carbon Damage Mitigation Certificate) links the carbon dioxide (CO2) emitted by a
producer with an absorber of CO2. It registers the mass of CO2 emitted into the
atmosphere with a process that absorbs an equivalent amount of CO2 from the atmosphere. The
NMT Carbon Calculator calculates a mass of CO2 emitted by a CDMC purchaser and registers it
with a known number of macadamia trees that have been planted by smallholders in Malawi. The cost of the
CDMC directly funds the farmers who plant and maintain annually surveyed trees that are registered as
absorbing an equivalent mass of the emitted CO2.
The trees have an average absorption rate of CO2 per year and a CDMC remains valid for a
year before it is retired. The purpose is to provide a strong link between those using CO2
such that macadamia farmers can receive direct funding for the trees they plant AND maintain annually.
The CO2 sequestration by the trees needs to continue for 25 years to be effective. The
primary purpose of the trees is for food security which then increases the security of the tree for a
minimum 25 year lifespan. In Malawi the trees are also viewed as a pension crop investment, even for
young farmers which increases the 25 year security of the tree.
Atmospheric Carbon Dioxide, CO2
Carbon dioxide (CO2) makes up about 0.04% of the Earth's atmosphere.
A very important property of atmospheric CO2 is its absorption of infrared radiation from
the Earth's surface. This absorbs heat energy from the Earth which would otherwise escape into space -
known as the greenhouse effect. Greenhouse gases, such as CO2, are important for preventing
the Earth cooling from heat radiation losses but also if atmospheric concentrations are too high cause
an increase of Earth's temperature. Each greenhouse gas has an index known as the Global
Warming Potential (GWP) indicating how significantly it contributes to insulating the Earth from
heat loss. CO2 has the standard GWP = 1.
Current atmospheric concentrations of the greenhouse gas CO2 are now high, resulting in the
rising temperatures being measured on Earth. The figures shown here indicate this.
When looking at this data it is important to note that the temperature trend has a time lag behind the
CO2 trend. It is not visible in Figure 4 because of the huge time scale (800,000 years). Also
to note Figure 3 indicates a strong correlation between CO2 levels and temperature but it is
statistical and not an exact one-to-one match.
These sets of clear, independent and long-term data show that serious action and response to deal with
CO2 and green house gas emissions are required. Increasing biodiverse tree coverage to
sequester CO2, whilst also addressing food security issues with agroforestry is one of the
many required activities.
It is well established that many human activities emit large volumes of CO2 into the Earth's
atmosphere. Hence it is possible to adjust human activity to reduce and compensate for CO2
emissions from human activity. A significant area of human activity that generates CO2
emission involves trees around all parts of the globe. Deforestation and the removal of trees increases
the emission of CO2 whilst also reducing the absorption of CO2 which occurs when
trees grow building up wood mass by the fundamental process of photosynthesis. Photosynthesis basically
converts water (H2O) and carbon dioxide (CO2) into a carbon chain (n CH2) and
oxygen (O2). The absorption of CO2 is known as sequestration.
CO2 sequestration by trees
Because trees produce oxygen and sequester CO2 the removal of trees and deforestation
increases the problem of CO2 emission. The Neno Macadamia Trust is focusing on building and
promoting agroforestry as a way to reverse deforestation and also mitigate CO2 emission
damage. Agroforestry is the use of trees to provide food but the trees also sequester (absorb)
CO2. NMT specifically promotes and enables macadamia agroforestry in Malawi with the primary
benefit being food security, especially for smallholder farmers.
Carbon sequestration through agroforestry is not quite the same as sequestration through general
reforestation programs because the trees are in a closer, more direct relationship with those who plant
and maintain the trees. The tree itself, its structure and mass of sequestered CO2 require
ongoing maintenance because of the food security it provides, rather than simply its sequestered carbon
Important secondary benefits are improving the sustainability of the environment: locally for the soil
in particular and globally in terms of CO2 sequestration. It can be described as Climate
Smart Macadamia Agroforestry (CSMA).
Carbon offsetting and Carbon Damage Mitigation Certificates
NMT is building a way of funding CSMA in Malawi by providing carbon offsetting for people in developed
countries to purchase carbon damage mitigation certificates (CDMC's) that directly support smallholder
farmers who are actively planting and sustaining healthy macadamia trees. NMT is working with a UK
academic organisation called Profs
Who Fly as well as individuals who can purchase CDMC's via the recently developed NMT Carbon Calculator.
Early stages of the work are providing NMT with a small quota of high value CDMC's linked to
CO2 sequestering macadamia trees in various parts of Malawi. CDMC's purchased directly fund
the smallholder farmers which enables them and the co-operatives which they work within to invest in
further macadamia agroforestry within their smallholder communities. This is enabled by the close
working relationship between NMT in the UK and HIMACUL (The Highland Macadamia Cooperative Union Limited
CO2 sequestration by macadamia trees
The quality of macadamia tree CO2 sequestration is high because the lifetime and health of
the trees are connected to the food security that they provide for the smallholder farmers. NMT is
currently selling the carbon offset value at £25 per tonne of CO2 (tCO2).
Carbon damage mitigation pricing information and guidance is available from
Government BEIS updated short-term traded carbon values and Table 1 of the 2018 PDF.
The trees linked to our certificates are well maintained by farmers because they provide food security. The ongoing maintenance improves the security, health and growth of the trees for many years, providing effective carbon sequestration. CDMC's that are purchased from NMT provide funding direct to the farmers who work to maintain the trees over many years.
Since 2017 NMT has carried out annual tree surveys which directly link trees to each CDMC that is purchased. The surveys also
monitor tree health and farming conditions.
The financial support and encouragement for the smallholder communities helps develop and extend agroforestry to address the food security and environmental issues that these communities face.
The mass of CO2 calculated is then allocated to macadamia trees planted by smallholder
farmers in Malawi which sequester the CO2. NMT prices the CO2 at £25 /
tCO2. The calculator provides full results of tonnes of CO2 emitted as a function
of distance flown from an extensive set of international airports, or from vehicle fuel consumption and
The purchaser can then buy the uniquely valued CDMC via the calculator. A monthly payment option for an
annual specified amount of CO2 can also be purchased.
Keep up-to-date with how we are working to build food security in Malawi