'Much sewage is discharged into the ocean'

Which environmental problem does it refer to?

To process used objects so that they can be used again

Making air, rivers etc. dirty.

The place in which people live and work, including the land, water, air, plants, animals and all physical conditions that affect them

This picture shows people walking through a highly-polluted city in China. From what type of pollution are they protecting themselves based on what they are wearing?

Does plastic waste affect our sea life and ocean?

Find a word for the following definition:

"the quality of causing little or no damage to the environment and therefore able to continue for a long time"

A resource that can replenish itself is...

Solar, wind and water energy are all...