In May 2006, Ambrose criticized the previous Liberal government's failure to meet the high targets that they had negotiated at Kyoto, saying, "We would have to pull every truck and car off the street, shut down every train and ground every plane to reach the Kyoto target the Liberals negotiated for Canada."
2006年5月，安布羅斯批評前自由黨政府無法達致《京都議定書》談判時所制訂的過高目標，並表示：「我們需要拿下所有貨車和私家車、停止火車服務及取消所有航班才可達致自由黨談判《京都議定書》時加拿大需要達致的減排目標。