How will the revised ETS affect forestry?
Associate Professor Euan Mason of the School of Forestry at the University of Canterbury, comments on the likely effects
on forestry and greenhouse gas production of the new, revised ETS announced this week.
The new ETS is being seen as a 'weaker' ETS due to its subsidies for business as well as the late inclusion of
agriculture - on of the country's most heavily-emitting industries - in the ETS, amongst other things.
In his commentary, Assoc. Prof. Mason points out that the new, weaker ETS will is unlikely to encourage afforestation
due to lowered demand for NZ Carbon Units. He also says that the ETS will require that New Zealand changes its behaviour
towards greenhouse gases at a slower rate.
An excerpt of Assoc. Prof. Mason's comments can be read below - the full version
, with accompanying graph, is available on the SMC website.
Impacts on domestic demand for NZUs
Under the existing ETS, domestic demand for NZUs would likely have exceeded the maximum capacity of existing Kyoto
forest (planted since 1989 on grassland) to supply credits by approximately 2013, thereby providing a powerful incentive
for investing in new forest plantings.
Under the proposed ETS, domestic demand for credits would not be likely to exceed the maximum capacity of current Kyoto
forest to supply NZUs until the early 2020s.
In making these calculations, there is a large uncertainty about national emissions of GHGs in future. The nation emits
approximately 88 Mt of CO2 equivalent/annum, and 88 million NZUs are required to fully offset this level of emissions.
National GHG emissions are likely to increase under the proposed ETS, which would bring forward the time when demand
exceeded supply from existing forests, but this effect is difficult to quantify.
Impacts on supply of NZUs from the forestry sector
Supply of NZUs might come from three sources within the forestry sector. Firstly, a proportion of Kyoto forest owners
will register for the ETS and the maximum possible supply from this source is approximately 16 million NZUs/annum.
Secondly, pre-1990 forest owners will receive an allocation of 50 NZUs per hectare in compensation for the removal of
the right to change land use without financial penalties. This latter supply of NZUs will be a one-off total of
approximately 72 million NZUs. Perceptions of likely demanInformation
Notes to Editors
The Science Media Centre (SMC) is an independent source of expert comment and information for journalists covering
science and technology in New Zealand. Our aim is to promote accurate, bias-free reporting on science and technology by
helping the media work more closely with the scientific community. The SMC is an independent centre established by the
Royal Society of New Zealand with funding from the Ministry of Research, Science and Technology. The views expressed in
this Science Alert are those of the individuals and organisations indicated and do not reflect the views of the SMC or