Although recycling of most other materials is successful, recycling of plastic packaging materials has scarcely improved in past years, and additional efforts will be required to reach the covenant's mechanical recycling obligations for plastics: 27% by 2001.
(recycling of most other materials; is; successful) (recycling of plastic packaging materials; has scarcely improved; T:in past years)
recycling of most other materials recycling of plastic packaging materials
is has scarcely improved
successful
T:in past years