estuvieron impactando
-they/you were hitting
Pretérito progresivo para el sujetoellos/ellas/ustedesdel verboimpactar.

impactar

Ellos están ubicados cerca de manglares, pastos marinos y corales. Información reciente demostró que las actividades comunitarias estuvieron impactando negativamente la calidad del agua.
They are located near mangroves, seagrasses and corals, and recent data demonstrated that community activities were negatively impacting water quality.
Palabra del día
la canela