In California, the state's huge dairy herd produces twenty-seven million tons of manure a year, the particulates and vapors from which have helped to make air quality in the argiculturally intensive San Joaquin Valley worse than it is Los Angeles.

Courage, kindness and a great determination to succeed in life with a smile were hallmarks of my wonderful wife. And why her story deserves to be told.

Perhaps once in a lifetime we meet someone who has the ability to inspire us in one brief meeting, who can confront not one but two life-threatening illnesses with remarkable courage – and instil hope in others in the face of the greatest adversity.Jennifer Roberts had all of those qualities – and so many more.