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Henry Igugu, Ph.D.

Henry Igugu, Ph.D., is a researcher and educator with expertise in building energy performance and sustainability. His work involves systems optimization in buildings for efficiency and competency development in green design. At Project Drawdown, his work focuses on assessing climate solutions in the building sector.

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Henry Igugu
February 25, 2026
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An image of a blue wall with a shadow from a nearby window
Better windows are great for the climate – and for your comfort
by Heather McDiarmid, Ph.D. and Henry Igugu, Ph.D.
Windows can be both the best part and the worst part of a home. 
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  • Climate Solutions
    • Drawdown Explorer
      Your ultimate climate solutions platform
    • Drawdown Food
      Science and research at the intersection of food and climate
    • Drawdown Nexus
      Triple wins for climate, people, and nature
  • Resources
    • Insights
      Fresh commentary on hot topics
    • Publications
      In-depth information on key climate solutions
    • Climate Solutions 101
      A six-part video series on climate solutions
    • Drawdown Roadmap
      A science-based strategy for accelerating climate solutions
    • Drawdown’s Neighborhood
      Showcasing climate heroes around the United States
    • Global Solutions Diary
      Community-generated climate solutions videos
  • Take Action
    • SHIFT
      Personalized guide to meaningful climate action
    • Job Function Action Guides
      Bring climate solutions to life at work
    • Drawdown Capital Coalition
      Maximizing the impact of climate investments
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