Serbia claims military neutrality and appears to be indiscriminate about where its arms end up.
Countries and areas in sub-Saharan Africa are projected to see their populations increase by 79% over the next 30 years, reaching 2.2bn people by 2054, according to the UN.
Sixty-plus experts examine degradation caused by land overuse and misuse, climate change and biodiversity loss.
The hotter the world gets, the more water the air can hold and the more it will rain.
Water is not only the basis of life for animals and plants but is also likely to become a contested resource in parts of the world in the coming decades, reports Statista.