It includes various prods and incentives to get states to enroll many more children who are below 200percentt of the poverty level, and projections suggest that a huge majority of children who would be enrolled in the expansion would come from this low-income group.
Most of the rivers in question are located in emerging economies - the Nile in Egypt, the Ganges in India, the Niger in West Africa - and such surges in economic activity could lift millions out of poverty, but these projections will only be realised if management of these regions' water supplies is improved significantly.
"As organisations and individuals concerned with their wellbeing, we are increasingly worried that the statement may worsen already-alarming projections that child poverty will rise by 800,000 by 2020".
The World Bank's upbeat projections, defining extreme poverty as the 1.3 billion people living on less than $1.25 per day, come as governments and international institutions prepare to set new targets to update the 15-year Millennium Development Goals set by the United Nations in 2000.
Even with optimistic projections, the child relative poverty rate will still be double what the relative child poverty target is.
DECC does not have a UK-wide projection for fuel poverty in 2012.
The Institute for Fiscal Studies has predicted that on current projections, by 2020 child poverty is likely to have increased by 39%.
It is designed to be representative in terms of race, age, gender, poverty level, and household size (based on projections from the 2000 Census).
Mr Sumner's projections, using different assumptions, suggest that poverty by 2030 could fall by anything between 600m and 1.6 billion.
