World Benchmarking Alliance+NAT.B13 Air pollutants+Formula

score = (x) -> 
  if x == "Yes"
    10
  else
    0
  
weights = [0.2, 0.2, 0.2, 0.2, 0.2]
air_pollutants = [reduction_evidence, management_and_monitoring, pollutants_reporting, time_bound_targets, target_reporting]

weights.reduce((weighted_sum, weight, index) -> 
              weighted_sum + weight*score(air_pollutants[index])
             , 0)