This is the 11741st most frequent Russian word.
загрязнения
"Pollution" or "contaminations."
In this sentence, 'загрязнения' is used in the genitive case to describe a condition or factor attributed to the air quality.
Воздух в городе страдает от загрязнения, вызванного транспортными средствами.
The air in the city suffers from pollution caused by vehicles.
Here, 'загрязнения' in the genitive singular form reflects the results or impact on water resources.
Научные исследования показывают увеличение загрязнения водных ресурсов.
Scientific research shows an increase in the pollution of water resources.
The word 'загрязнения' here is in the genitive singular case, referring to the specific type of pollution that impacts the environment.