They might claim with reasonable authority, that the amounts of lead in the air decreased as oil became a less common fuel.Right now, the oldest living tree in the world grows on the White mountains in California.
About 4,600 years old, it is nicknamed ‘Methuselah’, after the ancestor of Noah who is said to have lived for 969 years.
The age of the tree has been estimated by counting the number of its growth rings.
Use that office closet for more than storing old yearbooks.
Tree Ring eliminates waste by only printing as many books as ordered, but we also go one step further: we plant a tree for every yearbook sold.
The growth rings appear as lines on the core sample.