Good evening. I cannot say that all environmental scientists are out in the filed collecting data, but this is in the scope of the job description. Environmental scientists primarily provide information and guidance to stakeholders based on the environment in which they operate; preventive measures are applied to reduce, mitigate, or eliminate risks. Environmental scientists gain knowledge of their environment through training, research and evidence gathering or data collection. Data collection comes in different forms to include: surveys, interviews and questionnaires, all of which are essential to the environmental scientist in order to gain insight into the field of study. There are many different aspects of environmental science, i.e. epidemiology, sanitation, hygiene and entomology to name a few. I hope that this answers your question. Should you have any further questions, please feel free to ask.