Times have really changed. People are starting to realize that you need to engage in "end game thinking." In otherwords, you need to look at the marketplace now and in the future. The key word is CHANGE
Unfortunately, what it says in an educational or training facility catalog and what the job market says can be two different things
We have included two jobs metasearch engines in Open Options: Indeed.com and Simplyhired.com. Now let's just say that you are thinking about a degree in Environmental Science. By using the latter as a search term without any geographic delimiters, you can see what the national possibilities are. Now add geography, say a state or metro area that you want to live in. What do you see?
Read the job postings carefully and juxtapose this to your proposed course of study: DO THEY LINE UP?
Ah, but there's more: If you go to the bottom of the main search screen, click on trends, re-enter your search terms, in this case, Environmental Science, you can get an idea of demand over time.
FEDERAL GOVERNMENT - Federal Occupations by College Major
COLLEGE BOARD BIG FUTURE - MAJOR AND CAREER SEARCH - https://bigfuture.collegeboard.org/majors-careers