Edie: More than 20 times the amount of land currently growing bio- energy crops will have to be dedicated to the plants if Ireland is to meet its 2015 renewable heat and electricity targets, according to advisory body Teagasc. The body, which unveiled the “energy-crop calculator” at the National Ploughing Championships, said over 70,000 hectares of bio-energy crops such as willow and miscanthus were necessary. Currently only 3,500 hectares are planted with energy-crops and …