Is The USA First IN Developing Ground Source Heat Pump (GSHP) Systems>

Ground Source Heat Pumps have seen a tremendous market development in some European countries over the past years.
Sweden and
Switzerland are leading since the beginning in the 1980s, however, some other countries with a slow start in the same time, like Germany, now show good growth rates. In France, the development started later, but the opportunities for a widespread, successful use of GSHP are very good. 
The US MARKET has been established for decades, but has seen 
unprecedented growth in the recent years, largely to to economics, comfort and environmental concerns.