The rising incidence of weather extremes will have increasingly negative impacts on crop and livestock productivity, according to a new government report on climate change released last week.

The Third National Climate Assessment (NCA) explores the impact of climate change on various regions and industries. It says that while agriculture has been able to adapt to recent changes in climate, farmers are at risk of lower yields, increased soil erosion, reduced food quality and increased pressures from pests and weeds unless greenhouse...