This is the 13085th most frequent Russian word.
массовые
Massive or mass.
The word 'массовые' is used to describe gatherings that involve a large number of people.
Массовые собрания на площади проходили каждый вечер.
Mass gatherings on the square took place every evening.
Here, 'массовые' is used to qualify technologies related to mass production methods.
На производстве внедрили массовые технологии для улучшения эффективности.
They introduced mass production technologies to improve efficiency at the plant.
In this case, 'массового' describes deforestation occurring at a large scale.