Gosaba, Jan. 31: Mamata Banerjee today lent her voice to a pitch to facilitate land acquisition for a life-saving project — an uncommon plea that betrayed the government’s frustration at the slow pace despite the urgency and the promise of generous compensation. The chief minister persuaded the people of Sunderbans to offer their land to build embankments in low-lying areas of South 24-Parganas, which were devastated by the Aila cyclone in 2009.