Dell has today launched a long-term, global effort to become the greenest technology company on Earth. It has set an ambitious Zero Carbon Initiative whereby it aims to maximise the energy efficiency of Dell products, and over time offset their carbon impact. The company has also committed to reduce the carbon intensity of its global operations by 15% by 2012, as well as extending its "Plant a Tree for Me" programme into Europe. For £1 per notebook or £3 per desktop PC, customers can offset the emissions associated with the electricity their computer uses.