Hi aspirant,

A diploma in computer science is a computer based course which is a minimum of one year and can be upto three years as well. The learner’s of the course get an in depth about computer programming and coding. Whereas  a diploma course in environmental studies  is an in depth course about the analysis of environmental issues around the world. The course includes learning about the different kinds of pollution and and renewable sources of energy . Hope this helps. All the best!