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Can you put it on the scales, please? essay on farm animals for kids "The reality is, we know more than enough to prevent 75% of heart disease and strokes, but we're not doing everything we could be doing or even doing it at a reasonable level. We've made some gradual improvements over the years, but there is still a lot of progress to be made," commented lead scientist, Dr Brent Egan, of the Medical University of South Carolina.