BERLIN (Reuters) - A German inventor has angered animal rights activists with his answer to fighting the soaring cost of fuel -- dead cats. Christian Koch, 55, from the eastern county of Saxony, told Bild newspaper that his organic diesel fuel -- a home-made blend of garbage, run-over cats, and other ingredients -- is a proven alternative to normal consumer diesel. "I drive my normal diesel-powered car with this mixture," Koch said. "I have gone 170,000 km (106,000 miles) without a problem." The website of Koch's firm, "Alphakat GmbH", says his patented "KDV 500" machine can produce what he calls...