1. What discipline do you prefer the most and you want to build your career in the upcoming days?

Public Health: Epidemiology, Dermatology.

2.  How do you understand 'Environment as a discipline of Public Health? 

As a core discipline of public health, environmental health is concerned with the delineation of environmental factors and their relationship to human health. These factors include air, food, water, radiation, toxic chemicals, wastes, disease vectors, safety hazards, and habitat.

Environmental health is the branch of public health that: focuses on the relationships between people and their environment; promotes human health and well-being; and fosters healthy and safe communities. Environmental health is a key part of any comprehensive public health system.