Vulnerable countries demand global tax to pay for climate-led loss and damage

Poor nations exhort UN to consider climate-related and justice-based' tax on big fossil fuel users and air travel

The world's most vulnerable countries are preparing to take on the richest economies with a demand for urgent finance - potentially including new taxes on fossil fuels or flying - for the irrecoverable losses they are suffering from the climate crisis, leaked documents show.

Extreme weather is already hitting many developing countries hard and forecast to wreak further catastrophe. Loss and damage - the issue of how to help poor nations suffering from the most extreme impacts of climate breakdown, which countries cannot be protected against - is one of the most contentious problems in climate negotiations.