By Jithendra Antonio

Land based pollution is increasing at an alarming rate in Sri Lanka and it stands at 90 per cent in comparison to the international level of 40 per cent, Marine Pollution Prevention Authority (MPPA) Chairman M. A. R. Kularatne said.
Waste material washed into the sea from the land has been the main cause of marine pollution, he said.

The coastal waters off western India may be the largest natural low-oxygen system. In summer and autumn the oxygen level drops to 0.2 mg per litre, said S W A Naqvi, chemical oceanographer at National Institute of Oceanography in Goa. During these seasons, the institute

Oxygen threshold for dead zones needs revision ABOUT 246,000 square km of oceans