Reuters: German state bank KfW is raising the upper limit on credit it makes available for small and medium-sized renewable energy projects, Environment Minister Sigmar Gabriel said on Monday. The KfW, responsible for supplying revenues to the environment ministry to promote renewable energy, is boosting the credit limit to 50 million euros ($67.33 million) from 20 million euros for such projects, Gabriel said. The state bank would also extend its lending period to 15 years from eight …