Lusaka, Brazil, a city on the wall

Lusana, Brazil — Lusanas city walls are crumbling, but it’s not clear if it’s due to global warming.

A series of new reports by the World Bank and U.S. Geological Survey indicate that Lusanna has been losing about half of its population over the past decade, and it’s likely to be completely demolished by 2050.

It’s a major challenge for the city of more than 20 million people, but the researchers warn that it could happen.

The World Bank report warns that the city’s main population center, the central city of Santa Cruz, has experienced a decline of about 30% in the last five years.

That has led to a decline in the number of people in Santa Cruz and elsewhere, particularly in the surrounding areas.

That, coupled with the loss of water, has been responsible for the recent depletion of the river’s bed.

The scientists suggest that climate change could have a greater impact on the river than previously thought.

The report found that there were about 4 million people living in Lusanas central city, a population of around 6 million.

The city’s population has declined by 30% over the last decade, with the percentage of the population living below the poverty line shrinking from about 10% to 3%.

The report also said that in the past 15 years, more than 4 million hectares of land had been removed to make way for the construction of roads, schools and other infrastructure projects.

The study authors also noted that climate-related changes in the river basin are likely to intensify, particularly as temperatures rise, due to warmer water temperatures.

As the temperatures rise and precipitation decreases, water levels in the water table will increase, creating an even more severe situation for the Lusans central river, the authors wrote.

The city’s river bed, which is the source of its water, is also drying out.

It has lost an average of 6,000 cubic meters of water every year for the last 30 years.