Expenses a company has when it drills for oil or natural gas. Intangible drilling costs are sometimes convenient for a company's tax purposes because it can deduct intangible drilling costs in one year when the company perhaps found little or no oil from profits made in a different year when the company does find oil.
Bruce Lanphear, a professor at Simon Fraser University and also an expert in lead toxicity, said Edwards not only studies the impact of lead in water, but he makes his testing available to communities in need, like he did in Flint.
Scientists at the University of Glasgow have re-examined the forensic data collected by Canadian researchers of the ice-preserved remains of three crew members from the ill-fated Franklin expedition in 1845, and concluded that lead poisoning may have played less of a role than originally thought.