micronutrient deficiencies . More than 135 million people across 55 countries experienced acute hunger requiring urgent food, nutrition and livelihood assistance in 2019 . The COVID-19 pandemic is projected to increase the number of acutely food insecure people to 270 million people  and worsen malnutrition levels . The relationships between climate change and obesity vary based on geography, population sub-groups and/or stages of economic growth and population growth . Increasing temperatures could contribute to obesity through reduced physical activity, increased prices of produce or shifts in eating patterns of populations towards more processed foods . In the largest global study to date exploring the connections between child diet diversity and recent climate, data from 19 countries in six regions  indicated significant reductions in diet diversity associated with higher temperatures and significant increases in diet diversity associated with higher precipitation .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report