Bull power

If it smells like it, it probably is it, but in this case, that's a good thing! New technology is being developed in Canada to convert manure from farm animals into a renewable, source of natural gas (methane) that might be added to the existing energy mix to heat homes and power industry. David Simakov of the University of Waterloo and colleagues say the potential could be huge given how much of a problem animal waste is around the world. Manure from cows and pigs is perhaps the most troublesome but could be the most useful in gas production, potentially addressing global warming in two ways - reducing direct carbon emissions from unused waste and avoiding reducing our reliance on fossil fuels.