1. Longest
   Shortest
2. Simplest

Trees are the longest living organisms on Earth. Not only that, but they also never die of old age.

1. Pines
   Pollen
2. Cones

Pine trees spread seeds in the form of cones. Their cones actually have separate genders.

1. The floor
   The walls
2. Trees

The phrase "knock on wood" actually comes from a time when Pagans used to knock on trees. They did this to summon protective spirits that resided within the trees.

1. 1 pound
   20 pounds
2. 48 pounds

A mature tree can absorb as much as 48 pounds of carbon dioxide each year. By the time it's 40, a tree can have taken in as much as 1 ton of carbon dioxide.

1. Shade
   Sunlight
2. Wind

Moss grows on the side of the tree trunk that has more shade. In northern temperate climates, moss will grow on the northern side of the trunk. That means that if you get lost in the woods, you can find your way.

1. 2
   All
2. 6 out of 7

Pine trees grow on 6 out of 7 continents. The only continent where they do not grow is Antartica.

1. Raise
   Lower
2. Maintain

Trees naturally lower air temperature by evaporating water in their leaves. Talk about a natural defense against global warming!

1. At the same time
   At different times
2. Only once a year

The different parts of the tree grow at different times. For instance, the foliage grows in the spring, and the trunk grows in the summer.

1. 7 quarts
   10 gallons
2. 100 gallons

A large tree can drink as much as 100 gallons of water per day. While it does this, it actually cleans the water.

1. Damage
   Improve
2. Delay

Strategically planting trees can improve your energy bill by as much as 25%. They can provide shade during the summer, and also insulation and windbreak.

1. Cook
   Dance
2. Communicate

Trees are actually able to communicate with one another. When one tree is being attacked by insects, it can signal danger to the other trees so that they can start their own defense.

1. Minute's
   Day's
2. Year's

One large tree can provide a day's supply of oxygen for four people. Shouldn't we all thank a tree today?

1. 5%
   10%
2. 20%

More than 20% of the world's oxygen is supplied by the Amazon Rainforest. Better protect that beauty.

1. A filtration plant
   Quality pipes
2. A forested watershed

New York City is a great example of how a forested watershed can provide some of the highest quality drinking water. In 1997, the city spent $1.5 billion to preserve their forested watershed in upstate New York.

1. Less stress
   More satisfaction
2. Both

Office workers with a view of trees report less stress and more satisfaction. Do we need to drive this point home any further?

1. 5°
   10°
2. 20°

Trees can cool a city by up to 10°F. This is because they not only provide shade, but also release water vapor into the air.

1. 1%
   5%
2. 12%

In Baltimore they found that a 10% increase in tree canopy led to a 12% reduction in crime. Outdoor spaces with trees also enjoy less graffiti and vandalism.

1. $1.10
   $3.33
2. $5.60

A 2007 study showed that every dollar spent on trees in New York City would lead to a $5.60 return. Talk about an investment that everyone can agree on.

1. True
2. False

It's true that trees can be poisonous. The Manchineel tree of Florida is considered the most poisonous tress in the world.

1. Trees never die
   The more trees the merrier
2. All branches of a tree are equal in thickness to the trunk

Da Vinci's Rule of the Trees states that all branches put together are equal in thickness to the trunk of the tree. This theory appears to be true in many cases.

1. True
2. False

It's true that there's a tree in the U.S. that owns itself. In Athens, Georgia, a professor in the 1800s deeded to a great oak tree ownership of itself and the land within 8 feet of it.

1. Leaves
   Nutrients
2. Roots

Scientists have found that older, bigger trees share nutrients with smaller trees. These smaller trees actually pay them back when they grow up.

1. Cement
   Tree trunks
2. Leaves

The Venice Islands were literally built on the backs of trees. The foundation for the Islands is tree trunks, and they still support almost all of central Venice.

1. True
2. False

It's false that everyone knows where the world's tallest and oldest trees are located. Locations are kept top secret so that tourists won't damage the trees!

1. Gold
   Black
2. Rainbow

There are actually Eucalyptus trees in Hawaii that have rainbow-colored bark. No, they do not produce Skittles.

1. Mariah Carey
   Justin Timberlake
2. Britney Spears

Justin Timberlake actually had a company figure out the carbon footprint of his concerts. He paid to have trees planted to offset this carbon footprint during his nationwide tour.

1. Less
   More
2. The shortest

Today we actually have more trees in the U.S. than any time in the past 100 years. Forest growth has exceeded harvest since the 1940s.

1. Water
   Phytochemicals
2. Dead cells

Roughly 99% of a tree is actually made of dead cells. Only 1% of the tree is alive at any given time.

1. True
2. False

It's absolutely possible to create artificial trees. Columbia University did so, and their tree could soak up carbon dioxide 1,000 times more efficiently than regular trees.

1. New Mexico
   Utah
2. Washington

In Utah, there is an 80,000 year old forest that is made up of one tree. It's called a Quaking Aspen, and it has a massive underground root system.

1. 3
   7
2. 10

Since 1981, Chinese citizens over the age of 11 have been require to plant three to five trees per year. That's a step in the right direction.

1. 5%
   50%
2. 96%

An unbelievable 96% of ancient redwoods have been cut down. They are some of the tallest and oldest trees on the planet.

1. True
2. False

It's true that a Bonsai Orange Tree grows miniature oranges. We wonder what those would taste like.

1. Museum
   Hotel
2. Factory

Sweden is known for its famous TreeHotel. All the rooms are literally up in the trees.

1. Spikes
   Exploding fruit
2. Both

The Sandbox Tree is literally covered in spikes and has fruit that can explode and propel seeds. Much of the tree is even poisonous. That is one tree that you don't want to be around.