German Chancellor Angela Merkel rejected Monday calls for Greece to leave the eurozone, saying such an option was neither feasible nor legal, dpa reported. "I think that if we did, we might set off a domino effect that would be extremely dangerous for our monetary system," she told reporters in Berlin. Merkel said what was important was that Greece carried out the promises it made to obtain emergency loans. A departure from the currency zone was legally not possible, she said. "I regard it as politically proper to let all the countries in the eurozone be members," she said, rejecting calls from some of her supporters for Greece to be cut loose from the currency union. Germany's parliament is this week due to begin debating bills on boosting the European Financial Stability Facility (EFSF). On Wednesday, the country's highest court is to hand down its verdict on a legal challenge to last year's bailout of Greece.