abstract:Sir Geraint Llewellyn Evans (16 February 1922 – 19 September 1992) was a Welsh baritone or bass-baritone noted for operatic roles including Figaro in Le nozze di Figaro, Papageno in Die Zauberflöte, and the title roles in Falstaff and Wozzeck. He sang more than 70 different roles in a career that lasted from his first appearance at Covent Garden in 1948 to his farewell there in 1984.
The problem is that dung alone does not produce all that much energy relative to its size, says GeraintEvans, head of biofuels at the UK's National Centre for Biorenewable Energy, Fuels and Materials.