The disadvantage of the present division of roles and rules concerning waste handling is i.a. that there is great difference between the requirements under the official rules regarding the waste producer's responsibility and knowledge of waste treatment, and the way the tasks are solved in practice.

Make this lower case.
the disadvantage of the present division of roles and rules concerning waste handling is i.a. that there is great difference between the requirements under the official rules regarding the waste producer's responsibility and knowledge of waste treatment, and the way the tasks are solved in practice.