Mohammad Sani works with people in the Third World. He shows them how they can exploit solar energy using a machine they can build themselves from cheap materials. Sani invented this machine himself. During his last trip he saw a bomb explode in Iraq. Many people were killed. Then Mohammed Sani stopped eating. He just couldn’t face food. He lost twenty-five kilos. He was so weak, he could have been knocked over by a gust of wind. He is recovering now. “Now I have to taste everything”, he says when we sit down to eat together. “At last I can enjoy my food again.” When I met Mohammed Sani he only had five months left to live.