Why are there multiple critical load graphs for the same interest features at a particular site especially for dune habitats?
How do you apply the appropriate ammonia critical level to a vegetation type. For example, for vegetation types such as peatland and woodland would apply the 1ug it would mainly contain lower plants?
Are freshwater systems (eg flowing water, mesotrophic and eutrophic waters) sensitive to acid and nitrogen deposition?
Why are there data missing about Areas/Sites of Special Scientific Interest in some of the critical level/load datasets for download?
