True-that & a number of other fast-result contamin

True-that & a number of other fast-result contaminant-detector functions would be welcome as well. This tech appears to be within reach & the sooner-the-better. Everything from water to the air to the food we eat is suspect these days and being able to rapidly assess these for contaminants would go a long ways in preventing disease , thereby saving in misery & escalating healthcare costs. Let's get on with it...it's not like a needy market doesn't already exist for such things. There's a ready-made multi-billion$ industry if I ever saw one.