Botulinum toxins are the most lethal toxins known. For type A toxin, the toxic dose is estimated at 0.001 mcg/kg (Franz 1997); the lethal dose for a 70-kg person by the oral route is estimated at 70 mcg, by the inhalational route 0.80 to 0.90 mcg, and by the intravenous route 0.09 to 0.15 mcg (Sobel 2005).
1 hectare = 2.47105381 acres. .07 hectare= .17 acres per person. about 7500 square feet per person. While this figure produces a result of around 5-6 people per acre, there are plenty of caveats to consider. If the soil is not ideal, increase the land. If the growing season is short, increase the land.
To find out how many square miles in acres, multiply the acre value by the conversion factor or use the converter. 1 Acre = 0.0015625 Square Miles. For example, to find out how many square miles there are in 1000 acres, multiply the acre value by the conversion factor, 1000 ac * 0.0015625 = 1.5625 sq. miles in 1000 acres. Acre is an