5 countries most vulnerable to climate change:
- Central African Republic
"Shifting climate patterns in Western Africa are already posing water and food security challenges in this region. Research suggests that climate change has contributed to roughly half of the 90 percent reduction in the size of Lake Chad since the 1960s. The reduced availability of freshwater has contributed to water and food insecurity, migration and conflict in Niger, Nigeria, Chad and Cameroon, all of which border the lake," Hewston told CNBC.
The World Bank warned on Sunday that climate change could push more than 100 million people back into poverty over the next 15 years, with populaces in sub-Saharan Africa and South Asia seen most affected. That's because of the importance of agriculture to these economies, which is the industry most vulnerable to weather impacts.
The World Bank forecasts that by 2030, crop yield losses could push food prices 12 percent higher on average in sub-Saharan Africa, placing a heavy strain on poor households. In addition, global warming of 2-3 degrees Celsius could increase the number of people at risk of malaria and diarrhea, as well as worsen water scarcity, it said.