Brussels, 11/04/2011 (Agence Europe) - Although oil remained the principal source of energy in the EU in 2009, with a share of 37% of the primary energy total (total gross consumption), major changes have taken shape since 1999, with the share of renewables almost doubling over this period, growing from 5% to 9% of gross interior energy consumption. Although the share of gas rose from 22% 24%, that of nuclear energy remained practically stable at 14%. The share of oil dropped from 39% to 37%...