了解伐木和加工残留物对减缓气候变化的替代影响:孟加拉国 Chattogram 案例

IF 3.7 Q2 ENVIRONMENTAL SCIENCES Cleaner and Responsible Consumption Pub Date : 2024-09-13 DOI:10.1016/j.clrc.2024.100224
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引用次数: 0

摘要

在孟加拉国,伐木(如木制品和相关加工残留物)在减缓气候变化方面的作用鲜为人知,而且往往被忽视。本研究旨在了解孟加拉国 Chattogram 市地区伐木制品和相关加工残留物的替代影响。此外,我们还探讨了销售商和用户对使用木材生物质及其相关影响的看法,以及用户对使用木材、竹子、钢材和塑料等不同类别产品的满意程度。研究只考虑了从锯木厂到木制家具和建筑材料的锯材以及相关残留物,但不包括森林生态系统中的碳。我们使用三种不同类型的预先测试问卷(包括开放式和封闭式问题),对孟加拉国 Chattogram 市公司地区的 36 家锯木厂、62 家木材商、55 家家具制造商或商店的所有者或管理者进行了调查。我们对加工残留物、复合木家具、实木家具和建筑材料分别使用了 0.5、0.45、1 和 1.3 吨碳 tC-1 的一般转移因子。木制品和相关残留物的数量及其因替代而避免的排放量以 m3 工业-1 年-1 和 Mg 工业-1 年-1 表示。结果显示,锯木厂的木材年平均消耗量(783.95 立方米工业-1-年-1)和加工残渣年平均消耗量(196.05 立方米工业-1-年-1)最高,而家具制造商的消耗量(60.56 立方米工业-1-年-1 和 0.66 立方米工业-1-年-1)最低。从锯木到家具制造,圆木加工共产生了 36% 的剩余物。建筑房屋消耗的锯材(锯木厂和木材商)每年产生的避免排放量最高(1029.51 兆克 CO2 工业-1-年-1)。除了森林管理、排放、废物产生和产品生命周期评估等因素外,开发使用寿命长的高效产品也可能在决定对位移因素的总体影响方面发挥重要作用。今后的研究应侧重于针对建筑及相关行业的各种产品,结合生命周期评估方法,开展材料流分析,从而得出针对具体国家的位移系数。基于认知的研究表明,木制家具和作为生物能源的加工残留物被认为是非木制家具(如钢材、塑料)和化石燃料(天然气、石油)的良好替代品,从而降低了化石排放,因为木制品被认为是对用户和环境友好且有吸引力的。然而,消费者和销售者对木材和生物能源的使用以及森林退化的环境意识,对于将其从中性观念转变为积极观念至关重要。
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Understanding substitution impacts of harvested wood and processing residues to mitigate climate change: A case of Chattogram, Bangladesh

In Bangladesh, the role of harvested wood (e.g. wood products and associated processing residues) to mitigate climate change is less known and often ignored. This study aims to understand the substitution impacts of harvested wood products and associated processing residues in Chattogram city area, Bangladesh. Additionally, we also explored sellers' and users' perceptions towards the use of wood biomass and associated effects, with users’ level of satisfaction with using different categories of products of wood, bamboo, steel, and plastic. The study only considered sawn wood from sawmills to the wooden furniture and building materials, and associated residues, but excluded carbon in the forest ecosystem. A survey, using three different types of pre-tested questionnaires consisting of open and close-ended questions, was carried out in 36 sawmills, 62 timber merchants, and 55 furniture manufacturers or shops, with their owners or managers in Chattogram City Corporation area, Bangladesh. We used the general displacement factors of 0.5, 0.45, 1, and 1.3 tC tC−1 for processing residues, composite wood furniture, solid wood furniture, and building materials, respectively. The amount of wood products and associated residues and their avoided emissions due to substitution were presented in m3 industry−1 year−1 and Mg industry−1 year−1. Results revealed that the highest mean annual consumptions of timber (783.95 m3 industry−1 year−1) and processing residues (196.05 m3 industry−1 year−1) were in the sawmills and the lowest (60.56 and 0.66 m3 industry−1 year−1) in the furniture manufacturers. Altogether, the processing of round logs generated 36% residues of its mass from sawmilling to furniture manufacture. Sawn wood (of sawmills and timber merchants) consumed in the building houses produced the highest annual avoided emissions (1029.51 Mg CO2 industry−1 year−1). The development of efficient products with long lifespans, in addition to factors such as forest management, emissions, waste generation, and life cycle assessments of products likely play a significant role in determining the overall impact on displacement factors. The future study should focus on developing material flow analysis integrated with a life cycle assessment approach for various products for the construction and associated sectors, thus generating a country-specific displacement factor. The perception-based study documented that wood furniture and processing residues as bioenergy were perceived as a good substitute for non-wood furniture (e.g., steel, plastic) and fossil fuels (gas, oil) and thus lowering fossil emissions as wood products were perceived as user-and-environment-friendly and attractive. However, environmental awareness of both consumers and sellers about wood and bioenergy use and forest degradation is crucial for turning them into positive from neutral perceptions.

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来源期刊
Cleaner and Responsible Consumption
Cleaner and Responsible Consumption Social Sciences-Social Sciences (miscellaneous)
CiteScore
4.70
自引率
0.00%
发文量
40
审稿时长
99 days
期刊最新文献
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