This is the 4732nd most frequent Russian word.
загрязнение
Pollution.
Here, 'загрязнение' is used to denote environmental pollution affecting the atmosphere.
Загрязнение атмосферы приводит к изменению климата.
Pollution of the atmosphere leads to climate change.
Here, 'загрязнение' refers to the mess or contamination left in the apartment after renovation activities.
После ремонта в квартире осталось сильное загрязнение.
After the renovation in the apartment, there was significant pollution.
In this context, 'загрязнение' is describing the contamination or pollution of a water body.