You need to plan for the long term. Photography has very few job opportunities, with even fewer in nature and landscape photography, you will need to consider being self employed/freelance, and that will take a large amount of investment for you to establish yourself. With your specialist interest, it's useful to have a sound academic background in the relevant fields, studying anthropology, archaeology, biology, ecology, environmental sciences, geology, palentolgy, vetinary sciences, or zoology to a undergraduate standard would be the minimum expected, and having a masters, PhD and postdoc qualifications will all be bonuses. While at university you should make use of student privileges and make connections with the various conservationist, geological, geographical, ecological, palentological, and zoological societies, as these may provide you with a surprising number of opportunities to embark on projects which could form a stepping stone for you. You should aim for a well paying graduate job, and save every penny you have, as when you do enter the world of freelance photography you won't have a steady income, but you still need to pay the bills. Therefore having £50,000 saved up in the bank to cover costs, and spend on equipment and travel expenses is very useful. I estimate that £50,000 would probably keep you going for 12-24 months before you need to get a steady income. As you can see photography skills haven't been mentioned, mainly because the skills needed, particularly for nature and landscape photography are very simple indeed. You don't need more than a suitable camera and a good book (the book doesn't even need to be from this century!) to pick up the skills you need. The real difficult part is making a mark, so having the additional skills will help you stand out. Finally, in the current time, you should aim for science subjects, with a lean towards, the life sciences, and earth sciences, aiming to go to a Russell Group University. You will also gain a lot from joining your local Cadet or Scout movement, not only is it a good thing to have on your CV, the Cadets and Scouts will teach you important fieldcraft skills, and maybe even tracking skills which will come in useful for your future career.