the health consequences of involuntary exposure to tobacco smoke Problems Caused by Secondhand | Smoking and Use Public Health Burden of Secondhand

For example, the Cotton Insect Management section of the South Carolina Pest Management Handbook recommends that insecticides be applied as foliar sprays to control thrips in seedling cotton (up to four or five true leaves) when populations meet or exceed two or more thrips per plant, with particular attention paid to when immature thrips appear, signaling that insecticides used at planting are no longer providing control

Only if ash is from untreated tobacco or herbal cigarettes

Here, the researchers could show a clear this then that relationship (what medical researchers call a dose-response)

He also recorded two of his poems for the audio versions of Garrison Keillor's collection Good Poems (2002)