1.   In short, there was an apparent absence of political will to ensure that formal control mechanisms functioned in practice.

2.   Otherwise, they say, the market mechanism will not function properly and the cost of reductions will rise.

3.   However, the bomb did not explode because, police suggested, its mechanism was not functioning.

4.   In the final hours of the conference, Australia, Japan, Russia and Canada objected to five points on how market-based mechanisms would function.