In the U.K., the country where most U.N. experts believe phosphorus is most prevalent, authorities have warned residents to stay indoors as a precaution.
In Germany, officials have declared the phosphorus crisis a public health emergency and called for a temporary ban on the use of pesticides and fertilizer that could exacerbate the problem.
In the U!
S., officials have urged residents to limit their use of the chemical fertilizer to the areas they know to be safe.
In Pennsylvania, a state that has been hit particularly hard by the crisis, officials say residents should take measures to reduce the number of chemicals being used.