diff --git a/plugins/nf-co2footprint/src/main/nextflow/co2footprint/CO2FootprintConfig.groovy b/plugins/nf-co2footprint/src/main/nextflow/co2footprint/CO2FootprintConfig.groovy
index 336edea..e511449 100644
--- a/plugins/nf-co2footprint/src/main/nextflow/co2footprint/CO2FootprintConfig.groovy
+++ b/plugins/nf-co2footprint/src/main/nextflow/co2footprint/CO2FootprintConfig.groovy
@@ -29,6 +29,7 @@ class CO2FootprintConfig {
     final private String  file
     final private String  summaryFile
     final private String  reportFile
+    final private String  country
     final private Double  ci    // CI: carbon intensity
     final private Double  pue   // PUE: power usage effectiveness efficiency, coefficient of the data centre
     final private Double  powerdrawMem  // Power draw of memory [W per GB]
@@ -58,6 +59,7 @@ class CO2FootprintConfig {
         file = config.file ?: CO2FootprintFactory.CO2FootprintTextFileObserver.DEF_FILE_NAME
         summaryFile = config.summaryFile ?: CO2FootprintFactory.CO2FootprintTextFileObserver.DEF_SUMMARY_FILE_NAME
         reportFile = config.reportFile ?: CO2FootprintFactory.CO2FootprintReportObserver.DEF_REPORT_FILE_NAME
+        def country
 
         ci = 475
         if (config.ci && config.country)
@@ -66,6 +68,7 @@ class CO2FootprintConfig {
             ci = config.ci
         if (config.country)
             ci = retrieveCi(config.country)
+            country = config.conutry
 
         pue = config.pue ?: 1.67
         powerdrawMem = config.powerdrawMem ?: 0.3725
@@ -74,6 +77,7 @@ class CO2FootprintConfig {
     String getFile() { file }
     String getSummaryFile() { summaryFile }
     String getReportFile() { reportFile }
+    String getCountry() { country }
     Double getCI() { ci }
     Double getPUE() { pue }
     Double getPowerdrawMem() { powerdrawMem }
diff --git a/plugins/nf-co2footprint/src/main/nextflow/co2footprint/CO2FootprintFactory.groovy b/plugins/nf-co2footprint/src/main/nextflow/co2footprint/CO2FootprintFactory.groovy
index d6f435b..3742a8d 100644
--- a/plugins/nf-co2footprint/src/main/nextflow/co2footprint/CO2FootprintFactory.groovy
+++ b/plugins/nf-co2footprint/src/main/nextflow/co2footprint/CO2FootprintFactory.groovy
@@ -194,6 +194,38 @@ class CO2FootprintFactory implements TraceObserverFactory {
     }
 
 
+    // Compute CO2 footprint equivalences
+    List<Double> computeCO2footprintEquivalences() {
+        /*
+         * The following values were taken from the Green Algorithms publication (https://doi.org/10.1002/advs.202100707):
+         * The estimated emission of the average passenger car is 175 gCO2e/Km in Europe and 251 gCO2/Km in the US
+         * The estimated emission of flying on a jet aircraft in economy class is between 139 and 244 gCO2e/Km
+         * The estimated sequestered CO2 of a mature tree is ~1 Kg per month (917 g)
+         * A reference flight Paris to London spends 50000 gCO2
+         */
+        def gCO2 = total_co2 / 1000 as Double
+        String country = config.getCountry()
+        Double car = gCO2 / 175 as Double
+        if (country && country == 'United States of America') {
+            car = gCO2 / 251 as Double
+        }
+        Double tree = gCO2 / 917 as Double
+        car = car.round(2)
+        tree = tree.round(2)
+        Double plane_percent
+        Double plane_flights
+        if (gCO2 <= 50000) {
+            plane_percent = gCO2 * 100 / 50000 as Double
+            plane_percent = plane_percent.round(2)
+        } else {
+            plane_flights = gCO2 / 50000 as Double
+            plane_flights = plane_flights.round(2)
+        }
+
+        return [car, tree, plane_percent, plane_flights]
+    }
+
+
     /**
      * Class to generate text output
      */
@@ -665,7 +697,14 @@ class CO2FootprintFactory implements TraceObserverFactory {
          * @return The rendered json
          */
         protected Map renderCO2TotalsJson() {
-            [ co2:HelperFunctions.convertToReadableUnits(total_co2,3), energy:HelperFunctions.convertToReadableUnits(total_energy,3) ]
+            List equivalences = computeCO2footprintEquivalences()
+            [ co2:HelperFunctions.convertToReadableUnits(total_co2,3), 
+              energy:HelperFunctions.convertToReadableUnits(total_energy,3),
+              car: equivalences[0],
+              tree: equivalences[1],
+              plane_percent: equivalences[2],
+              plane_flights: equivalences[3]
+            ]
         }
 
         /**
diff --git a/plugins/nf-co2footprint/src/resources/CO2FootprintReportTemplate.html b/plugins/nf-co2footprint/src/resources/CO2FootprintReportTemplate.html
index a57f9f9..9cebd9e 100644
--- a/plugins/nf-co2footprint/src/resources/CO2FootprintReportTemplate.html
+++ b/plugins/nf-co2footprint/src/resources/CO2FootprintReportTemplate.html
@@ -21,6 +21,7 @@
   <meta name="description" content="Nextflow workflow report for run id [${workflow.runName}]">
   <meta name="author" content="Sabrina Krakau">
   <link rel="icon" type="image/png" href="https://www.nextflow.io/img/favicon.png" />
+  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
 
   <title>[${workflow.runName}] Nextflow Workflow Report</title>
 
@@ -209,6 +210,31 @@ <h4>Workflow execution completed unsuccessfully!</h4>
         <dd class="col-sm-9">${co2_totals.energy}Wh</dd>
       </dl>
       </dl>
+
+      <p>This is equivalent to:</p>
+      <dl class="row small">
+        <dt class="col-sm-6"><i class="fa fa-tree"></i> Months a tree would need to sequester this amount of CO2</dt>
+        <dd class="col-sm-3">${co2_totals.tree}</dd>
+
+        <dt class="col-sm-6"><i class="fa fa-car"></i> Km by car</dt>
+        <dd class="col-sm-3">${co2_totals.car}</dd>
+
+        <% if (co2_totals.plane_percent) { %>
+        <dt class="col-sm-6"><i class="fa fa-plane"></i> Percentage of a flight Paris - London</dt>
+        <dd class="col-sm-3">${co2_totals.plane_percent}%</dd>
+        <% } %>
+
+        <% if (co2_totals.plane_flights) { %>
+        <dt class="col-sm-6"><i class="fa fa-plane"></i> Number of flights Paris - London</dt>
+        <dd class="col-sm-3">${co2_totals.plane_flights}</dd>
+        <% } %>
+      </dl>
+
+      <p>The calculation of these values is based on the carbon footprint computation method
+        developed in the Green Algorithms project: www.green-algorithms.org</p>
+      <p>Lannelongue, L., Grealey, J., Inouye, M.,
+        Green Algorithms: Quantifying the Carbon Footprint of Computation.
+        Adv. Sci. 2021, 2100707. https://doi.org/10.1002/advs.202100707</p>
     </div>
   </div>