Regular farmed cotton uses chemicals, insecticides, and pesticides, THis contaminates the soil while harming workers with the chemicals used. Over time of course causing health problems.
While Organic cotton, doesn't use harmful chemicals, insecticides or pesticides. Making it a healthier work environment and the ability to reuse the soil and water for livestock. Although it does require 2,500L of water for just 1 t-shirt. Double that of regular farmed cotton, as well as producing smaller yields.
So what's the right choice? I would still advocate for organic cotton, as it makes for a healthier work environment, and although the water consumption is more it can at least be reused for other resources. With the yield being smaller it's important we go back to the ways of less is more! Quality and craftsmanship is something that was (and still is) respected butt with the rise of fast fashion, it seemed we as a society tended to shy away from it. It's now time to get back to it!
The most important thing is to be imfored and have the information in front of you. Maybe washing your clothes less if they dont need to be (pants don't smell or aren't stained? Don't wash them) and wear them more often. Hang drying is also a great option, especially for cotton (wool too of course) garments.