Chemist deals with the pharmaceutical and chemical industry field, Environmental specialist deals with nature and its conservation and Physicist deal with the astronomy, power and energy.
Explanation:
The chemist is someone who has done chemistry, it is the study of chemicals in nature and the human body. They design medicines and the chemicals needed for it. All the chemical companies are their responsibilities.
An environmental specialist is some who has done a study on nature and all the animals and plant species on earth. The work on the conservation of nature and animals.
The physicist is someone who has done physics, which is a study of physical objects and their forces. They have the responsibility of power and energy. They also deal with astronomical objects.
