GM crops have large benefits and pose no unique safety concerns, writes head of the Brazilian Biosafety Association, Leila Oda.

Biofortified crops are carefully selected to work for, not against, poor farmers, says Bonnie McClafferty from HarvestPlus.

Tackling micronutrient deficiencies isn't as simple as popping a few pills, says Michiel Korthals.

Indigenous and wild cassava species offer a cheap source of key nutrients, says Brazilian agriculturalist Nagib Nassar.