Environmental science can cover various aspects from what I can tell. When I was checking out courses the focus of the course varied from one institution to the next.
Some were focused the on geological / meteorlogical proper science stuff, others on human impact on eco-systems, and others on envornmental legislation and planning. And lots of courses covered more than one of these areas, in varying proportions
The proper science stuff interests me the most, but the course I want to do covers all three. The plan is to be an envoronmental consultant, and hopefully get to travel the world advising on different projects. Whether that’ll happen or not who knows, but you gotta have a dream!