Boy do we all need trees! Why? Let me explain. Humans, and virtually all other
critters, live on a gas called oxygen. Oxygen is one of the gases found in air and ...
Most newly planted trees need only fifteen gallons of water a week. As trees ...
urban lot. Aside from fruit for humans, trees provide food for birds and wildlife.
Life without trees, we humans would not exist on Earth. Keep a tree around. ...
Let's face it, we could not exist as we do if there were no trees. A mature leafy ...
Shade from trees reduces the need for air conditioning in summer. In winter, trees
You will need table tennis balls to represent molecules of H2, O, C, O2 and
sunlight. ... How many trees do we need to produce enough oxygen for one
Trees provide us with many essential things. Humans need trees to survive - read
Whether you live in the city or the country, it's hard to imagine a life without trees.
They provide shade in the summer, beautiful colored leaves in the autumn, and ...
Apr 27, 2013 ... Each Arbor Day, people are encouraged to plant and care for trees. ... Of critical
importance to humans, they also play a major role in producing ...
It depends on where the trees are. If you plant a palm tree in Moscow, it can't
survive without a greenhouse and the human-managed infrastructure it would
Aug 23, 2012 ... Trees release oxygen when they use energy from sunlight to make glucose from
carbon dioxide and water. ... A human breathes about 9.5 tonnes of air in a year,
but oxygen only makes up about ... How long do parrots live?