So now let's see (0) what you need to become a professional environmentalist. First, you shouldn't (11) ... be afraid of difficulties - you will have to come to terms with things: rummaging through the trash, (12) ... exploring poison pipes and much more that seems to be (13) ... very nice ... Secondly, think carefully if you are interested in science (14) ... for example, your university course is based, and also if you are interested in (15) ... complex computer calculations. Thirdly, rest assured that all your dreams of becoming an environmental police secret agent, attacking (16) ... a whaling ship from Greenpeace and so on, will be (17) ... a reality. But now you should be ready (18) ... to start working somewhere, like a water station or your local department of the environment, filing pollution penalty reports. Finally, you have to take (19) ... Nature and love it, because it is the main ingredient of your success and it should all be motivating. Love (20) ... Nature is the main feeling that you need to listen to when mastering a new profession!