The Earth's climate is changing.

Sonic tomography, or the use of sound waves to detect decay in trees, is a relatively new technology available to arborists.

Thousands of trees are struck by lightning every year. These trees will have varying degrees of damage ranging from complete shattering and destruction of the tree, to a slow lingering death, to virtually no apparent damage at all (Figure 1).

An ever-growing, international body of research points to many human health and wellness benefits that result from nearby nature experiences. But what about trees?

Conifers are commonly planted in North America to provide year-round screening, as windbreaks or as focal trees in the landscape.

U.S. urban land increased from 2.6% (57.9 million acres) in 2000 to 3.0% (68.0 million acres) in 2010. States with the greatest amount of urban growth were in the South/Southeast (TX, FL, NC, GA and SC).