From Xinhua (link):

Stricter measures to ensure officials responsible for pollution accidents are held to account have been called for by Chinese Premier Wen Jiabao who observed that environmental protection was still not receiving enough notice in some areas.

“Those who cause major pollution accidents through wrong decisions or lax supervision must be severely punished,” Wen said on April 17 at the sixth national environmental protection conference held in Beijing. The full transcript of the speech was published on Sunday.