A Lesson for India in a Fog So Thick It Could Kill a Cow In 1873, London was blanketed in a fog so dense that people could not see their feet. Still, it took 83 years before clean air rules were introduced. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:Q&A: Among Monarch Butterflies, a New Generation Gap Every YearTrial by Fire: Critics Demand That a Huge Sepsis Study Be StoppedCancer cure breakthrough: Scientists unveil 'Star Trek' device for detecting cancer cellsBIG FREEZE WARNING: Earth braced for DECADE OF COLD WEATHER as solar activity plummetsHow to Stop Poaching and Protect Endangered Species? Forget the ‘Kingpins’Giving Malaria a Deadline