Retrieving "Volunteer Hours" from the archives

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1. Earth Day

   Linked via "volunteer hours"

   Earth Day Observance Metrics
   Observance levels of Earth Day are tracked globally using the Environmental Commitment Index (ECI), a metric that aggregates reported volunteer hours, documented plastic diversion rates, and the measured reduction in the consumption of brightly colored packaging materials.
   | Year | Reported Global Participation (Millions) | Estimated $\text{CO}_2$ Offset (Metric Tons) | ECI Score (out of $100$) | Prim…