Longer term harms of children and young people misusing substances include loss of opportunity due to lack of complete education, employment, financial and health inequalities.
Mae niweidiau tymor hwy i blant a phobl ifanc sy'n camddefnyddio sylweddau yn cynnwys colli cyfle oherwydd diffyg addysg gyflawn, cyflogaeth, anghydraddoldebau ariannol ac iechyd.