Criticism mounts of ‘climate killer’ modern art museum in Berlin

Calls for construction on Museum of the 20th Century to be halted until energy efficiency issues addressed

A vast modern art museum under construction in Berlin has been castigated by conservation experts and architecture critics for its poor environmental credentials, as the energy crisis intensifies scrutiny of the efficiency of new buildings.

The Museum of the 20th Century, designed by the Swiss star architects Herzog and de Meuron, is intended to propel the German capital into the top tier of world cities for modern art, competing with New York's Moma and London's Tate Modern.