The Impact of Wood Use on North American Forests Educational-Advertisement
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EDUCATIONAL-ADVERTISEMENT 1 CONTINUING EDUCATION CONTINUING The Impact of Wood Use on CONTINUING EDUCATION 1 AIA LU/HSW North American Forests Learning Objectives After reading this article, you should be Can specifying wood for buildings contribute to able to: 1. Evaluate the use of wood as a construction forest sustainability? material in the context of long-term forest sustainability as well as attributes such as Sponsored by Think Wood | By Roxane Ward and Dave Patterson, RPF low embodied energy and light carbon footprint. 2. Discuss forest sustainability measures such s green building has evolved beyond As this course will demonstrate, the as biodiversity, soil and water quality, and its initial emphasis on energy answer to that question has several ele- harvest versus net growth. Aefficiency, greater attention has been ments. On one hand, North American forest 3. Examine the concept that using wood given to the choice of structural materials and practices are among the world’s best, and in buildings provides an incentive to the degree to which they influence a building’s the amount of forested land, in both the landowners to keep forested lands forested environmental footprint. Increasingly, wood United States and Canada, has been stable instead of converting them to uses such as urban development. from sustainably managed forests is viewed for decades. On the other, there are threats— as a responsible choice—for a number of such as climate change, increased wildfire, 4. Compare the carbon benefits of an unmanaged forest versus a managed forest reasons. Wood grows naturally by harnessing insect infestation and disease, and deforesta- where timber is used for wood buildings. energy from the sun, absorbing carbon tion due to urban development—which are dioxide and releasing oxygen. It is renewable broader than the forest industry and must be To receive AIA credit, you are required to and a carbon sink, and it outperforms other addressed at a societal level. Drawing from a read the entire article and pass the test. Go to materials in terms of embodied energy, wide range of research publications, the fol- ce.architecturalrecord.com for complete text air and water pollution, and other impact lowing pages will examine the current state and to take the test for free. This course may indicators.1 of North American forests, modern forest also qualify for one Professional Development But what about the forest? The benefits practices, and criteria for sustainability, and Hour (PDH). Most states now accept AIA credits for engineers’ requirements. Check above notwithstanding, how can building consider some of the challenges that could your state licensing board for all laws, rules, designers be sure that specifying wood does profoundly impact the future of the forest and regulations to confirm. not negatively impact the North American resource. In this context, the course will AIA COURSE #K1911C forest resource? also discuss why strong markets for wood 2 THE IMPACT OF WOOD USE ON NORTH AMERICAN FORESTS EDUCATIONAL-ADVERTISEMENT Photo courtesy of Plum Creek/© Frank Rosenstein; Source: www.pefc.org and www.fsc.org as of March 2019 Certified Forest Certified Area in Canada & Area in Canada & U.S. U.S. vs. Global Certified Area 300 CANADA & U.S. SFI, ATFS, CSA (PEFC) & FSC 250 200 CONTINUING EDUCATION CONTINUING 150 100 54% 46% Millions of acres of Millions 50 SFI FSC CSA ATFS Millions of acres 370 160 36 18 Millions of hectares 150 65 15 7 REST OF THE WORLD PEFC & FSC Shown is a second-growth working forest in Oregon. products provide an incentive for landown- Until the early 1900s, settlers coming to that net forest growth has outpaced the ers, not only to invest in forest management North America cleared an average of 2.1 acres amount of wood harvested for decades sup- but also to keep forested land forested even of forest per person to survive and grow food.3 ports the idea that landowners who depend though greater profit can often be made by Since then, the establishment of industrial economically on the resource have a strong converting it to other uses. agriculture and other changes in land use have incentive for their sustainable management mitigated the need for forest clearing, and forest for the long term. This aligns with global IS NORTH AMERICA RUNNING OUT acreage has been stable for close to a century. forest data, which indicates that forest prod- OF FORESTS? The United States reported an annual ucts and industrial roundwood demands According to the National Report on increase in forest area of 0.12 percent in the provide the revenue and policy incentives to Sustainable Forests–2010, “On the whole, 1990s and 0.05 percent from 2000 to 2005, support sustainable forest management.7 no evidence suggests that we are using up while Canada had no change, and twice as However, with urban development and our forests. In fact, the total area of forests much wood is being grown each year as is other uses increasingly vying for land, an has been stable and the volume of wood on harvested.4 In both countries, responsible issue going forward will be making sure that them increasing.”2 forest management has resulted in more landowners continue to have reasons to keep than 50 consecutive years of net forest forested lands forested. growth that exceeds annual forest harvests. Deforestation is the permanent Canada conversion of forest land to United States Canada has 857 million acres of forestland, non-forest land uses. Around The United States has approximately 765 which is about 90 percent of the forested million acres of forest area, which is about area it had before European settlement. 8, 9 the world, it is a major issue one-third of the country’s total land area.5 Ac- Ninety-four percent of the forest is publicly and contributor to global warm- cording to the National Report on Sustainable owned and managed by provincial, federal, ing. In the United States and Forests–2010, “This stability is in spite of a and territorial governments. The remaining Canada, the rate of deforesta- nearly three-fold increase in population over 6 percent is on private property belonging to the same period and is in marked contrast more than 450,000 private landowners. tion has been virtually zero for with many countries where wide-scale defor- Wood supply is the term used to describe decades; however, the value of estation remains a pressing concern.” the estimated volume of timber that can forest land in agriculture and Forty-two percent of U.S. forests are be harvested from an area while meeting owned by entities such as national, state, environmental, economic, and social objec- real estate maintains pressure and local governments; the rest are owned tives. Governments regulate harvest levels 6 to convert. by private landowners, including more than on public lands by specifying an annual 22 million family forest owners.5 The fact allowable cut. EDUCATIONAL-ADVERTISEMENT THE IMPACT OF WOOD USE ON NORTH AMERICAN FORESTS 3 Photo: www.naturallywood.com DEFINING FOREST SUSTAINABILITY EDUCATION CONTINUING Forest sustainability was first described in the book Sylvicultura oeconomica by German author Hans Carl von Carlowitz, published in 1713—and, while our understanding of what constitutes sustainability has evolved significantly in 300 years, it has long been a cornerstone of forest management.14 Von Carlowitz’s work planted the seed for what we now know as sustainable development, defined in the landmark 1987 report of the World Commission on Environment and Development (the ‘Brundtland Report’) as “development that meets the needs of the present without compromising the ability of future generations to meet their own needs.” The Food and Agriculture Organization of the United Nations (FAO) defines sustainable forest management as “the stewardship and use of forests and forest lands in a way and at a rate that maintains their biological diversity, productivity, regeneration capacity, vitality, and potential to fulfill, now and in the future, relevant ecological economic and social functions at local, national, and global levels, and that does not cause damage on other ecosystems.” In the United States and Canada, forest sustainability is measured against criteria and indicators that represent the full range of forest values, including biodiversity, ecosystem condition and productivity, soil and water, global ecological cycles, economic and social benefits, and social responsibility. Sustainability criteria and indicators form the basis of individual country regulations as well as third-party sustainable forest certification programs. Certification bodies conduct forest man- agement audits as part of the third-party Wood is the only building material that procedures, systems, and performance of on- certification process. has third-party certification programs in the-ground forest operations against the pre- place to demonstrate that products being determined standard. The audits, performed sold have come from a responsibly managed by experienced, independent foresters, TOOLS FOR ACCOUNTABILITY resource. As of March 2019, more than 584 biologists, socio-economists, or other profes- Although types of ownership vary, forest million acres of forest in the United States sionals, are conducted by certification bodies management in the United States and Canada and Canada were certified under one of the accredited to award certificates under each of operates under layers of federal, state/provin- four internationally recognized programs the programs. A certificate is issued if a forest cial, and local regulations and guidelines that used in North America: the Forest Steward- operation is found to be in conformance with foresters and harvesting professionals must ship Council (FSC), Sustainable Forestry the specified forest certification standard.13 follow to protect water quality, wildlife habitat, Initiative (SFI), Canadian Standards As- soil, and other resources. Laws addressing sociation’s Sustainable Forest Management EPDs and Forest Certification safety and workers’ rights also govern forestry Standards (CSA), and American Tree Farm The wood industry has been a leader in the activities.