UN body calls for a sea change in policies to protect marine biodiversityListen /
Human activity is wreaking havoc on the world's oceans, according to the UN body overseeing a global treaty on biodiversity.
Overfishing, toxic pollution from chemical compounds and heavy metals, and run-off from farming and sewage are already pressuring marine eco-systems, while climate change could increase sea temperatures and ocean acidity.
Tuesday, 22 May, is the International Day for Biological Diversity and this year's focus is on the oceans, home to the largest animal on the planet—the blue whale—but also microscopic life forms such as phytoplankton, responsible for half the oxygen on Earth.
Dianne Penn spoke to David Ainsworth, information officer at the Secretariat of the UN Convention on Biological Diversity in Montréal, Canada who says the oceans are under attack.