refactor: updating GLOBAL_INTENSITY figure from 475 => 440

thegreenwebfoundation · Mar 9, 2022 · fd55085 · fd55085
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Showing 2 changed files with 3 additions and 3 deletions.
diff --git a/src/sustainable-web-design.js b/src/sustainable-web-design.js
@@ -13,8 +13,8 @@ const { formatNumber } = require('./helpers');
 
 // Taken from: https://sustainablewebdesign.org/calculating-digital-emissions/#:~:text=TWh/EB%20or-,0.81%20kWH/GB,-Carbon%20factor%20(global
 const KWH_PER_GB = 0.81;
-// Taken from: https://sustainablewebdesign.org/calculating-digital-emissions/#:~:text=intensity%20of%20electricity%20(-,475g/kWh,-).%C2%A0
-const GLOBAL_INTENSITY = 475;
+// Taken from: https://www.iea.org/reports/renewables-2021
+const GLOBAL_INTENSITY = 440;
 // Taken from: https://gitlab.com/wholegrain/carbon-api-2-0/-/blob/master/includes/carbonapi.php
 const FIRST_TIME_VIEWING_PERCENTAGE = 0.25;
 const RETURNING_VISITOR_PERCENTAGE = 0.75;

diff --git a/src/sustainable-web-design.test.js b/src/sustainable-web-design.test.js
@@ -20,7 +20,7 @@ describe('sustainable web design model', () => {
     it('should calculate the correct co2 per visit', () => {
       const averageWebsiteInBytes = 2257715.2;
       const energy = swd.energyPerVisit(averageWebsiteInBytes);
-      expect(swd.emissionsPerVisitInGrams(energy)).toEqual(0.21);
+      expect(swd.emissionsPerVisitInGrams(energy)).toEqual(0.2);
     });
 
     it('should accept a dynamic KwH value', () => {