Heads of state, finance leaders and activists from around the world will converge in Paris this week to seek ways to overhaul the world's development banks — like the International Monetary Fund and World Bank — and help them weather a warmer and stormier world.

Russian hostilities in Ukraine are preventing grain from leaving the “breadbasket of the world" and making food more expensive across the globe, threatening to worsen shortages, hunger and political instability in developing countries.

Monica Kariuki is about ready to give up on farming. What is driving her off her 10 acres of land outside Nairobi isn’t bad weather, pests or blight — the traditional agricultural curses — but fertilizer: It costs too much.