21.   Western countries are overwhelmingly responsible for current levels of greenhouse gases.

22.   Western countries enjoyed considerable advantages in terms of technology.

23.   Western countries must take a longer term perspective.

24.   Western countries should be grabbing the opportunities presented by the new openness.

25.   Work is progressing on a study that will affect the security policies of western countries for years to come.

26.   Yet, despite the mushrooming of coffee bars in the high streets of western countries, supply still exceeds demand.

27.   The struggle in Moscow has called in Western countries.

28.   ...ministers from leading western industrial countries.

29.   In Western countries girls are far less likely to offend than boys.

30.   Estonia has done much to cultivate the friendship of western European countries.