There are three ways to mitigate climate change: by avoiding greenhouse gas (GHG) emissions, by storing GHGs (carbon) in forests and forest-based products, and by capturing GHGs from the atmosphere. The manufacture, use and recycling of paper-based packaging contributes to all three.

Sustainable forestry practices increase the ability of forests to capture and sequester atmospheric carbon while enhancing other ecosystem services, such as improved soil and water quality. Planting new trees and improving forest health through thinning and prescribed burning are some of the ways to increase forest carbon in the long run. Harvesting and regenerating forests can also result in net carbon sequestration in wood products and new forest growth.[1]

In the long term, a sustainable forest management strategy aimed at maintaining or increasing forest carbon stocks, while producing an annual sustained yield of timber, fiber or energy from the forest, will generate the largest sustained [climate change] mitigation benefit.
Intergovernmental Panel on Climate Change, 2018

The forest products industry plays an important role in contributing to the production of renewable energy and reducing dependence on fossil fuel by using residuals and byproducts (biomass) to produce much of the energy required for its operations. Because trees absorb CO₂ when they grow, the international carbon accounting principle accepts that biomass is carbon neutral when combusted for energy.[2]

The carbon neutrality of biomass harvested from sustainably managed forests has been recognized repeatedly by an abundance of studies, national legislation and international policy, including the guidance of the Intergovernmental Panel on Climate Change (IPCC) and the reporting protocols of the United Nations Framework Convention on Climate Change.
International Council of Forest and Paper Association, 2020

The U.S. paper and forest products industry reduced carbon emissions by 23.3% between 2005 and 2018. The Canadian paper and forest products industry reduced its greenhouse gas emissions by 38% between 2006 and 2016.[3, 4]

The recycling of paper-based packaging avoids greenhouse gas emissions that result when paper products are landfilled. At about 44.2 million tons, paper and paperboard recycling in the U.S. resulted in a reduction of about 148 million tons of carbon dioxide equivalents (CO₂e) in 2017. This reduction is equivalent to removing over 31 million cars from the road for one year.[5]

Nearly every piece of plastic begins as a fossil fuel, and greenhouse gases are emitted at each stage of the plastic lifecycle: 1) fossil fuel extraction and transport, 2) plastic refining and manufacture, 3) managing plastic waste, and 4) plastic’s ongoing impact once it reaches our oceans, waterways, and landscape.[6]

Sources:

1. USDA Forest Service, 2020
2. International Council of Forest and Paper Associations (ICFPA), 2020
3. American Forest & Paper Association (AF&PA), 2020
4. Natural Resources Canada, 2019
5. US Environmental Protection Agency, 2020
6. Center for International Environmental Law, 2019