This is the 164th most frequent Russian word.
количество
Quantity.
This sentence shows 'количество' used to express a countable or measurable quantity.
Количество людей на концерте было велико.
The number of people at the concert was large.
Here, 'количество' describes the measurable extent or magnitude of emissions in a quantitative manner.
Экологические организации стараются уменьшить количество выбросов в атмосферу.
Environmental organizations strive to reduce the amount of emissions into the atmosphere.
In this context, 'количество' refers to the sum or total of items, specifically employees, needed for an activity.