Abstract

BackgroundBritish Columbia’s (BC) extensive forest resources provide climate change mitigation opportunities that are available to few other jurisdictions. However, as a consequence of the Mountain Pine Beetle outbreak and large-scale wildfires, BC is anticipating reduced roundwood harvest for the next decades. Progress towards more climatically efficient utilization of forest resources is needed. This research quantitatively compared the greenhouse gas emission consequences of nine harvested wood products trade and consumption strategies. Inward-focused strategies use wood products within Canada to achieve emission reduction objectives, while outward-focused strategies encourage exports of wood products.ResultsIn the business-as-usual baseline scenario, average emissions arising from BC-originated harvested wood products between 2016 and 2050 were 40 MtCO2e yr−1. The estimated theoretical boundaries were 11 MtCO2e yr−1 and 54 MtCO2e yr−1, under the scenarios of using all harvests for either construction purposes or biofuel production, respectively. Due to the constrained domestic market size, inward-focused scenarios that were based on population and market capacity achieved 0.3–10% emission reductions compared to the baseline. The international markets were larger, however the emissions varied substantially between 68% reduction and 25% increase depending on wood products’ end uses.ConclusionsFuture bioeconomy strategies can have a substantial impact on emissions. This analysis revealed that from a carbon storage and emission perspective, it was better to consume BC’s harvests within Canada and only export those products that would be used for long-lived construction applications, provided that construction market access beyond the US was available. However, restricting export of wood products destined for short-lived uses such as pulp and wood pellets would have significant economic and social impacts. On the other hand, inward-focused strategies had a small but politically and environmentally meaningful contribution to BC’s climate action plan. This study also revealed the conflicts between a demand-driven bioeconomy and targeted environmental outcomes. A hierarchical incentive system that could co-exist with other market drivers may help achieve emission reduction goals, but this would require a better quantitative understanding of wood products’ substitution effects. While the analyses were conducted for BC, other regions that are net exporters of wood products may face similar issues.

Highlights

  • British Columbia’s (BC) extensive forest resources provide climate change mitigation opportunities that are available to few other jurisdictions

  • Scenarios that extended the service lives of harvested wood products (HWPs) (i.e. ALL_CONS, increase driven by population (IN_POP), Increase domestic market share of timber construction (IN_CONS) and Scenario label (OU_CONS)) resulted in lower emissions than those that focused on short term uses (i.e. ALL_FUEL, Scenario label (IN_FUEL), Scenario label (OU_CN) and Scenario label (OU_PLTS))

  • The mitigation analysis revealed that from a choice between inward- and outward-focused bioeconomy and a biogenic carbon emission reduction from harvested wood products perspective, it was better for BC to consume the harvested biomass within Canada and only export those harvested wood products that would be used as longterm construction materials, such as structural lumber, engineered timber products and wood composites for cabinets, walls and countertops

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Summary

Introduction

British Columbia’s (BC) extensive forest resources provide climate change mitigation opportunities that are available to few other jurisdictions. The province of British Columbia (BC) in Canada is well endowed with one of the largest forest areas per capita in the world: 11.2 ha per person [3, 4]. These forest resources provide climate change mitigation opportunities that many other jurisdictions do not have and they are expected to contribute to meeting the province’s and Canada’s emission reduction targets. The size of the HWP carbon pool fluctuates depending on the service times of various end uses as well as society’s consumption capacity and disposition practices of HWPs [8,9,10]

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