This is the 10664th most frequent Catalan word.
reduirien
"Reduirien" means "they would reduce."
In this case, 'reduirien' is used as the conditional form of the verb 'reduir' to describe a hypothetical reduction.
Si tingueren menys problemes, reduirien el seu estrès.
If they had fewer problems, they would reduce their stress.
Here, 'reduirien' functions in a hypothetical sense, predicting the outcome of actions aimed at reducing emissions.
Els esforços en sostenibilitat reduirien les emissions contaminants.
Efforts in sustainability would reduce pollutant emissions.
The use of 'reduirien' shows a subjunctive-dependent conditional action involving reduction for optimization.