1.   On the upper levels of the church lichen deposits have reached unacceptable levels.

2.   Amounts of toxic gases in our cities have already reached unacceptable levels and this is showing up in the big increases in respiratory illnesses.

3.   The scallop beds at Pentland Firth, between Orkney and mainland Scotland, contained unacceptable levels of cadmium and were declared unfit for human consumption.

4.   The factories can be reported to the pollution inspectorate if unacceptable levels of pollution are found.

5.   Some environmentalists argue, however, that it will produce unacceptable levels of pollution, and that it is also economically inappropriate.

6.   The committee heard today that gangs regularly hurled abusive comments at local people, making an unacceptable level of noise and leaving litter behind them.

7.   John Wright, counsel for Timex Electronics, told the judge the gatherings had produced disorder of an unacceptable level.