Agence France-Presse: Natural catastrophes in 2007 were more frequent and costlier than a year earlier and climate change will make them more expensive still, the world’s second-biggest re-insurer, Munich Re, said Thursday. There were 950 natural catastrophes in 2007 compared with 850 in 2006, the highest number since the group started compiling its closely watched annual report in 1974. The total cost of disasters in 2007 was 75 billion dollars (51.5 billion euros), while the bill for 2006 was 50 …