Tropical rainforests have an emergent layer of tall trees over 40 m tall ... including evergreen rainforest, seasonal deciduous forest, tropical cloud forest, and mangrove forest.

Arborists are hoping to transform vacant land on Detroit's eastside by planting giant sequoias, the world's largest trees.

Evergreens are prized for their ... "They are disease-prone, have weak structures, and are shorter-lived than most trees," she adds. Still, Hanrahan says that their fast growth makes them a ...

Giant sequoia saplings planted by Detroit arborists aim to combat pollution and preserve native trees, creating an urban ...