Climate change, population growth the greatest threats to food security: advocates

Anti-hunger advocates say populations need to shrink to ensure the world's people can have secure access to food. Currently more than 820 million people around the world are hungry, with increasing rates in subregions of Africa, Latin American and Western Asia. Advocates are urging policy-makers to help reverse population growth and prepare for the effects of climate change to counter food insecurity

A Vietnamese farmer on a rice field in Mekong Delta, Vietnam Source: Getty Images