New Scientist: Legislate against pollution all you like, but don’t expect nature to tow the line. Recent research on the wildfires that raged in California in 2007 shows that ground ozone levels were probably pushed significantly past legal “safe” limits. When found high up in the atmosphere, ozone benefits life by blocking harmful radiation from the Sun. At ground level, though, it is responsible for a number of respiratory illnesses, ranging from coughs to bronchitis and emphysema. It also …