According to the BBC News article "UK food research 'needs a boost,'" by Pallab Ghosh,
global food production needs to double by 2050 (Ghosh, http://news.bbc.co.uk/2/hi/science/nature/8192628.htm). Some barriers to progress include climate change, change in the land, and less access to water (Ghosh). Scientists are working on how to produce plants without upping greenhouse emissions (Ghosh). They are also concerned about genetically modified foods which are not accepted in some places, including Europe (Ghosh).
More can be done by everyone when we have emissions-free energy technology that will also help get clean water to people all over the world. For more information, please see www.terrahumanafoundation.org.