Lead is a heavy metal that occurs in all soils but can reach hazardous levels in some soils as a result of leaded-fuel exhaust, industrial wastes and other causes. Learn how to test your soil for safety and see what you can do if lead levels run too high.

Horses, goats, sheep, and cattle can sicken or die if they eat from a poisonous plant. The best strategy is just to keep these plants out of reach. Here are photos, ID info, and poisoning symptoms for more than 30 hazardous ornamental and range plants.