Wholesale maize prices are up 50% from a year earlier in South Africa.

Agreement will save cost and time, make working together easier.

Countries commit to putting forward their best efforts to reduce greenhouse gas emissions.

The total GHG emission reductions in 2014 from global biofuel use was 169 million tonnes.

Public-private partnerships, reducing greenhouse gas, increasing productivity and collaboration to achieve large-scale change are among issues discussed.

Farmers, consumers face challenges in adapting to a changing environment.