PWL Partnership Landscape Architects Inc.’s Post

Did you know green roofs can help sequester carbon? The plant material and substrate in a green roof system are capable of capturing carbon from the atmosphere. According to a study by Getter et al. (2009) on the Carbon Sequestration Potential of Extensive Green Roofs, a green roof can offset its own carbon footprint in just 9 years due to energy savings alone. But that's not all—green roofs also sequester carbon in their substrate and vegetative material. As plants convert carbon dioxide into oxygen, they also store carbon in their biomass. The study found that sedum planting can reduce the carbon payback period by an additional 2 years, meaning it only takes 7 years for an extensive sedum green roof to offset its carbon footprint! Further research by Whittinghill et al. (2014) shows that plants with higher biomass, such as ornamental plants, prairie plants, and vegetables, can further increase the carbon sequestration potential of green roofs. Imagine the impact we could have by incorporating these plants into our green roofs! — #pwlpartnership #pwlgreenroofs #climatepositive #carbonsequestration #greenroofs #sustainablecities

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