The Ocean Cleanup, an innovative passive system designed to clear plastic waste from the oceans, will be launching their first open water test in early 2016.
This proposal to revitalise New Delhi through a polluted network of canals would minimise pollution and improve transport but it keeps getting delayed.
Experts have released 30 000 catfish into the Chicago River in an effort to measure the signs of progress in cleaning up the notoriously polluted water.