This is the 13365th most frequent Turkish word.
kirletmekle
"Kirletmekle" means "by polluting" or "by contaminating" in English.
The word 'kirletmekle' in this sentence is used as an instrumental case form of 'kirletmek', conveying the act of polluting as a means that leads to an outcome, namely risking our future.
Doğayı kirletmekle geleceğimizi riske atıyoruz.
By polluting the nature, we are risking our future.
Here, 'kirletmekle' expresses the act of polluting the water as part of a completed action, emphasizing the consequence of the mistake made.
Bu suyu kirletmekle büyük bir hata yapmış oldun.
By polluting this water, you made a big mistake.
In this instance, 'kirletmekle' signifies the topic or action of polluting, suggesting a focus on addressing and resolving associated issues rather than assigning blame.