An American company which backs the ability of agriculture to sequester carbon is offering millions of dollars for innovative solutions, in its Terraton Challenge.

Several thousand people have marched in French cities to protest against a state of emergency introduced after November’s attacks in Paris and a proposed nationality-stripping law that led France’s justice minister to quit last week.

Ireland’s challenge to meet climate change goals while maintaining its tradition as a producer of high quality food was spelt out by the Taoiseach Enda Kenny to one of the world’s largest gatherings of national leaders in Paris.