A big part of the problem is shortage of qualified teachers, so schools shy away from resourcing this subject and they don't encourage students to consider it. I think it is an engaging subject for both City students and Country students, with excellent career prospects.
Decades ago, this subject was called Geology, and there was a mining boom, and qualified geologists were earning megabucks in mining, so it was impossible to attract geologists into teaching. Then there was a mining bust, and the geologists found themselves driving taxis. The subject got a bad name as an unstable career option.
Then Geology merged with Ecology and became Earth and Environmental Science (E&ES). To teach E&ES properly, you needed a qualification in Biology and Geology, so the pool of qualified teachers shrank even more. You get this chicken-and-egg problem, without good Geology teachers you don't attract a critical mass of students into Geology as a career.
In every school I have worked in, there was no Science teacher with a qualification in Geology, but there are heaps with a qualification in Biology. If E&ES is offered, it is mostly taught by Biology teachers teaching out of their field of expertise, which is sad because as I said, the career prospects in E&ES have never looked brighter.