ghg-inventory-1990-2013

1990–2013
In 2013, emissions from the Energy sector had increased by 31.9 per cent (7,664.3 kt)
above the 1990 level of 23,994.6 kt CO 2 -e. This growth in emissions is primarily from
Road transportation, which increased by 5,197.0 kt CO 2 -e (69.4 per cent), and Public
electricity and heat production, which increased by 1,550.1 kt CO 2 -e (44.4 per cent).
Emissions from manufacture of solid fuels and other energy industries have decreased by
1,253.1 kt CO 2 -e (49.9 per cent) from 1990. This decrease is primarily due to the
cessation of synthetic petrol production in 1997.
2012–2013
Between 2012 and 2013, emissions from the Energy sector decreased by 1,036.3 kt CO 2 -e
(3.2 per cent). This decrease is primarily due to a decrease in emissions from Public
electricity and heat production. Due to higher hydro inflows in 2013 compared to 2012,
the share of electricity generated from renewable energy sources in the national energy
grid increased from 73 per cent in 2012 to 75 per cent in 2013. This resulted in decreased
gas and coal-based electricity generation over the year. Electricity generation from coal
decreased 33 per cent from 2012.
There was also a 261 kt CO 2 -e (11 per cent) decrease in sector fugitive emissions. This
was due to reduced activity in Coal mining and handling, as well as reductions in natural
gas and venting and flaring.
Industrial processes and product use (chapter 4)
2013
In 2013, New Zealand’s Industrial Processes sector produced 5,071.5 kt CO 2 -e,
contributing 6.3 per cent of New Zealand’s total greenhouse gas emissions. The largest
source of industrial processes emissions is the Metal industry category (CO 2 and a
small amount of PFCs), contributing 45.9 per cent of Industrial Processes sector
emissions in 2013.
1990–2013
In 2013, emissions from the Industrial Processes sector increased by 1,795.5 kt CO 2 -e
(54.8 per cent) above the 1990 level of 3,276.0 kt CO 2 -e. This increase has largely been
driven by emissions from the product uses as substitutes for ODS 4 category, with an
increase in these emissions of 1,615.2 kt CO 2 -e. This is driven by hydrofluorocarbon
emissions, which have increased because of their use as a substitute for
chlorofluorocarbons, as these were phased out under the Montreal Protocol. Also, CO 2
emissions from the Mineral, Chemical and Metal industry categories have gradually
increased due to increasing product outputs. These increases have been partially offset by
a reduction in emissions of PFCs from aluminium production, due to improved control of
anode effects in aluminium smelting.
2012–2013
Since 2012, emissions from the Industrial Processes sector increased by 115.9 kt CO 2 -e
(2.3 per cent). The change was the result of combined increases in emissions from the
Product uses as substitutes for ODS (51.6 kt CO 2 -e, 3.3 per cent increase), as well as
small increases in CO 2 emissions from the Metal industry (42.0 kt CO 2 -e, 1.8 per cent)
and Mineral industry (19.7 kt CO 2 -e, 2.6 per cent).
4
ODS – Ozone Depleting Substances.
x New Zealand’s Greenhouse Gas Inventory 1990–2013