Denmark is a very coastal country. It has to worry about sea level rise. Trees can help hold soil in areas that may be more saturated than others. Trees aren't necessarily help with sea level rise directly, but, will help with soil retention from flooding and erosion. Where any coastline meets with enough elevation; trees will help.
...Despite the fact (click here) that most of Denmark was originally covered with forest, Denmark only has 14.1% forest cover today, which corresponds to 608,078 hectares. This is however a progression since 1800 when Denmark had just 2-3% forest cover left because of intensive and uncontrolled logging in favor of agriculture. Efforts to increase the forest cover were initiated in 1805 with the Danish Forest Act and the forests continue to expand today. However, Denmark is still very poor in forestland - also compared to Europe as whole.
Thus, the efforts to increase reforestation in Denmark must continue and in addition to this, it has become an urgent matter and a key objective to preserve the biodiversity of the natural forests. Natural forests are characterized by a large numbers of trees, a variety of species, and a mix of old and new plants. Forestry practices should take this diversity into account and allow for an abundance of flora and fauna....
Children love to plant trees and observe birds and woodland creatures. Planting trees as a national event can be a great activity for any country. If Denmark were interested in planting more trees, perhaps focusing on existing "tree stands/forests" and fight forest fragmentation as is possible. Fragmentation of forests reduces the potential for habitat destruction that exists today and expansion in the future.
Denmark is a realatively small country and has many issues geographically, forests can be wonderful, but, there needs to be room for the people as well.
The graph above (to the right) shows (click here) the absolute mean water level around Denmark in metres for the years 1900-2100. The grey-shaded curve for the years 1900-2012 shows the observed, annual mean water level measured by Danish water gauges, adjusted for isostatic uplift. The blue thin curve for the years 2012-2100 shows the IPCC's best estimate of mean water level in the North Sea for the RCP4.5 scenario, and the light blue shadow indicates the uncertainty for this scenario. The dotted line shows the Danish Meteorological Institute's estimate of an upper limit for water level rises for use in uncertainty calculations. To the right of the figure are shown the mean value and uncertainties for the period 2081-2100 for the four IPCC scenarios as well as for BACC's assessment of the A1B scenario. The dotted line here shows the upper estimate for this period by the Danish Meteorological Institute....