<human>:  How much money would it take to end world hunger?
<bot>: The Copenhagen Consensus estimates that it would take about $2.6 trillion to end world hunger. This is an extremely ambitious goal, but the cost of achieving it is far lower than the cost of not doing so. The world spends $1 trillion each year on food aid, but that does not help people who are starving. The world would need to spend about $400 billion per year on agricultural research and development to help farmers produce more food. This would require a major shift in the way the world currently produces food, but it is an achievable goal.