Nairobi, Feb. 27 -- World leaders are in Nairobi to debate and make decisions on 19 pressing environmental issues at the world's largest environmental gathering.

The meeting, attended by more than 4,000 delegates from over 180 countries, is being hosted by the United Nations Environment Programme (Unep) at its headquarters in Gigiri.

This year's gathering will be the sixth session since the inception of the United Nations Environment Assembly (Unea 6) in the year 2012. It comes at a critical time when the world has three main inflection points to deal with, and only six years left to actualise the UN Sustainable Development Goals (SDGs).

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The meeting has a special focus on...