Science

You need to understand that Pilot training is governed and regulated by DGCA and it is irrespective of the flying school you choose to train with. For becoming a commercial pilot, there is a specific eligibility criteria, which you should first be aware of. This is decided on what subjects have you taken in class 12th. It requires 50% in PCM to be pilot. And, even if you have not opted for the same, then you can appear separately for these subjects and become eligible. Further, you should be aware that you are medically fit to be a pilot, so I would suggest you visit:
http://www.dgca.nic.in/medical/medical-ind.htm and go to the class 2nd examiner's tab to find out doctors who will examine you for initial fitness. You can visit any doctorate from the list as per your convenience. Once you are done with Class 2nd medical, find out a suitable flying club for you as per your convenience. You can fly in India or abroad. I would suggest you fly in India. Besides finding the club, be aware that you will have to appear for:
1. Air Navigation
2. Aviation Meteorology
3. Air Regulations
4. Aviation Technical
5. Aircraft Specific
6. Radio Telephony
Here, 1-5 are conducted by DGCA and 6 is conducted by WPC. Prepare for these subjects and appear, as exams are conducted every quarterly. For preparation, flying club will help you or there are private instructors available in metro cities as well. You will fly for 200 hours+clear DGCA and WPC exams+clear Class 1st medical, then you shall get your CPL. The next license is ATPL, which you shall be able to apply for once. You will then have to probably fund or self-sponsor your type rating on whatever fleet you are selected in an airline. Then, you finally get a job as a pilot. I hope the process is well explained to you. CPL is an expensive affair. It might cost you around Rs.18-20 Lacs for flying + DGCA exams Rs.500/- each exam + Medicals for Rs.10,000 + endorsements and license issue fees around Rs.25k + Type Rating around Rs.15 Lacs. So, decide wisely before you opt for this field.

Environmental Science is a branch of science which studies the effects of physical, chemical, and biological conditions of the environment and their effect on organisms. Environmental Science also deals with Ecology. Ecology is the study of how organisms interact with our environment. Environmental Science has emerged from the field of medicine and natural history. Environmental Science is also known as Environmental Engineering also called as an interdisciplinary field because it includes the fields from the Social Science and the humanities. Apart from the study of biological and physical characters of the environment, it also includes the social and cultural factors and impact of humans on the environment. Importance of Environmental Science:
To know more about the sustainable way of living. Understand the behaviour of organisms under natural conditions. To educate and aware people about environmental problem & issues. To use natural resources more effectively without harming the environment. It teaches the human beings the importance of our environment and how to conserve it. There are other branches of environmental Science like atmospheric Science which focus on the Earths atmosphere. Another is ecology, the study of how organisms interact with the environment and which focuses on chemical alterations in the environment, such as water pollution and soil contamination which is also known as environmental chemistry.