hhlost writes: "'Japanese scientists used a range of data to calculate the environmental impact of a single purchase of beef.' They concluded that '2.2lb of beef is responsible for greenhouse gas emissions which have the same effect as the carbon dioxide released by an ordinary car travelling at 50 miles per hour for 155 miles, a journey lasting three hours. The amount of energy consumed would light a 100-watt bulb for 20 days.'"
A method of solution is perfect if we can forsee from the start,
and even prove, that following that method we shall attain our aim.