A host of countries have recently announced major commitments to significantly cut their carbon emissions, promising to reach "net zero" in the coming years. The term is becoming a global rallying cry, frequently cited as a necessary step to successfully beat back climate change, and the devastation it is causing.

With the world population expected to rise to 9.7 billion by 2050, food production will need to keep pace, and experts believe the Ocean can provide much of the sustenance we need. The second story in our two-part series on aquaculture focuses on the opportunities for significantly scaling up fish farming.

World Health Organization (WHO) Director-General Tedros Adhanom Ghebreyesus told Member States on Monday that efforts to tackle climate change and poverty had been set back by a lack of global unity since major agreements were struck five years ago, and welcomed the chance to work with the presumptive new US administration of president-elect Joe Biden.

UN Secretary-General António Guterres has welcomed Japan’s announcement on Monday that it would reduce carbon emissions to zero, by 2050, as part of the global effort to slow the worldwide rise in temperatures, and prevent the most damaging effects of human-made climate change.