I had the same question as I worked through my undergrad in biology, focusing on ecology and conservation.
There are lots of niches in terms of environmental work, a few off the top of my head are: fisheries, transportation (usually on a local/state level), non-profits, state fish and wildlife departments, the US department of ecology, clean energy, stormwater management, solid waste, water quality, environmental policy.
I work as an ecologist, specializing in wetland systems. So, my job is to go into the field and mark out a wetlands boundary, so that wetlands are not encroached upon (because they aid in flood retention, water quality, habitat, etc). As a consultant, we work for clients who wish to develop the land, but we must take into consideration the policies that are in place to conserve these types of ecosystems. I've become versed in construction, local/state/federal level environmental policy, and of course, ecology.
To see what's out there in your area, I'd search things like "environmental specialist," "environmental services," "environmental consulting," "environmental nonprofit" on job sites like LinkedIn, Indeed, and GovernmentJobs. A lot of municipal governments and enviro non-profits offer internships for high schoolers.
Hope that helps! The possibilities are really endless based on your interest and we need more people championing the environment.
Good luck :)
As I told my daughter you can work for consulting firms, states, federal, industry. Many professionals I know have opened their our consulting companies.
But to succeed you need to take AP chemistry, calculus and physics to prepare you for college
The first 2 years of college (the weed out years) required you repeat chemistry, calculus and physics so prepare yourself.
Good luck...go for it..Google Environmental Science to learn more