Thursday, 09 February 2012 03:59

Some alternative vehicle fuels such as liquid coal can cause more harmful greenhouse gas emissions than petrol or diesel, scientists warn. "Liquid coal, for example, can produce 80% more global warming pollution than [petrol]," says the US non-profit environmental group, the Union of Concerned Scientists. Some people have billed liquid coal, the name for petrol or diesel derived from coal, as a potential replacement to the oil on which countries rely heavily to fuel vehicles.

Likewise another alternative fuel, petrol from tar sands, is estimated to have 14% more global warming potential compared with standard petrol, says the union in its latest report Biofuels: an important part of a low-carbon diet. Duis molestie diam in ante aliquet hendrerit. Fusce non leo ipsum, sit amet dictum orci. Curabitur eu turpis magna; ut sollicitudin enim. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Vestibulum nisi est; placerat fringilla sollicitudin eget, cursus eget dui! Proin et orci et erat dapibus euismod id et purus.

Thursday, 09 February 2012 03:59

Technology is revolutionizing the medical field with the creation of robotic devices and complex imaging. Though these developments have made operations much less invasive, robotic systems have their own disadvantages that prevent them from replacing surgeons. Minimally invasive surgery is a broad concept encompassing many common procedures that existed prior to the introduction of robots, such as laparoscopic cholecystectomy or gall bladder excisions.