Pollution can also be defined as the introduction by humans, directly or indirectly, of substances or energy into the environment resulting in deleterious effects as harm to living resources, hazards to human health, or hindrance to particular activities.
(Pollution; can also be defined; as the introduction by humans, directly or indirectly, of substances or energy into the environment)
Pollution
can also be defined
as the introduction by humans, directly or indirectly, of substances or energy into the environment