Spend it on micronutrients.
That's the conclusion from the Copenhagen Consensus Center when the organization tried to identify the best bang-for-the-buck "investments" to help the planet:
Guided by their consideration of each option's costs and benefits, and setting aside matters like media attention, the experts identified the best investments: those for which relatively tiny amounts of money could generate significant returns in terms of health, prosperity, and community advantages. These included: increased immunization coverage, initiatives to reduce school dropout rates, community-based nutrition promotion, and micronutrient supplementation.
Read the full story in Slate.