Recent figures suggest 80% of wheat for breadmaking is home grown. This is a much higher percentage than back in the 70's.
According to the European Environmental Agency:
    105 million ha., or 16 % of Europe's total land area (excluding Russia) were estimated to be affected by water erosion in the 1990s.
    Some 42 million ha. of land were estimated to be affected by wind erosion, of which around 1 million ha. were categorised as being severely affected.
    A recent new model of soil erosion by water has estimated the surface area affected in the EU‐27 at 130 million ha. Almost 20 % is subjected to soil loss in excess of 10 tonnes/ha./year.
    Increased variations in rainfall pattern and intensity will make soils more susceptible to water erosion, with off-site effects of soil erosion increasing.
    Increased aridity will make finer-textured soils more vulnerable to wind erosion, especially if accompanied by a decrease in soil organic matter levels.
According to Defra: degradation processes that threaten soil resources include: i) soil erosion, ii) organic matter decline, iii) compaction, iv) salinisation, v) landslides, vi) contamination vii) soil sealing, and viii) loss of biodiversity. Whilst not all these are necessarily significant in England and Wales, estimates for the UK put the total marginal cost of soil degradation at between £206-315 million per year. Evidence suggests that these costs are incurred in many different ways, affecting diverse ecosystems and stakeholders, over a range of spatial and temporal scales.
If it is assumed that climate change generates more extreme weather events, these will adversely impact soil erosion and degradation.
Both erosion and degradation are being taken far more seriously than previously with remote sensing being utilised.Previously the concepts were recognised but now there is a real attempt to quantify the processes/problems/costs.

http://www.ukauthority.com/data4good/entry/6796/defra-raises-sights-for-satellite-data