Water availability, access and affordability are acute problems for poor and crisis-vulnerable people, while billions of dollars in profits are extracted from the sector.
Secretary-General Guterres calls for massive support to help Pakistan with a $16 billion rebuilding effort following devastating floods in September.
A combination of torrential rains –10 times heavier than usual – and apocalyptic floods have killed 1,700 people across Pakistan this year.
Negotiations have been gridlocked, with developing countries unifying behind a call for COP27 to create a specific loss and damage fund - an idea that has faced reluctance from richer polluters wary of liability.
The announcement came days after the Asian Development Bank also announced $2.3 to $2.5 billion in "flood relief support" after apocalyptic floods killed nearly 1,700 people across the country.
The train is loaded with 554 tons of relief supplies and is expected to reach Pakistan's capital Islamabad in about two weeks.
Cairo is "putting a lot of effort" into ensuring the question of how to compensate countries that have experienced heavy economic loss due to climate catastrophes is prioritised in Sharm El Sheikh summit.
Protests at around 450 sites worldwide demand rich countries pay for the damage global heating is inflicting upon poor nations, six weeks before UN's climate summit in Sharm El Sheikh.
Pakistan PM Shehbaz Sharif urges justice for developing nations that are at "ground zero" of climate crisis but bear little responsibility for global heating, in a passionate address at UN General Assembly.
The United Nations has warned of a "second disaster" in Pakistan from diseases such as dengue, malaria, cholera and diarrhoea, as well as from malnutrition.
Floodwaters are receding and the Indus River, which had swelled until earlier this month, is now rushing at "normal" levels towards the Arabian Sea, officials in the worst-hit southern province say.
Pakistani Prime Minister Shehbaz Sharif spoke to Turkish President Recep Tayyip Erdogan to thank him for aid sent by Türkiye and to seek further help on reconstruction work in the flood-hit areas.
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