The Green Belt Movement *has* planted 50 million trees, so far...
There is no simple answer to that as trees come in different sizes and so need to be planted in different ways. Trees that will grow to be very big need more space when they are planted than smaller types of trees. Then there are other factors like where trees could be planted. In hard rocky areas, it would not be easy to plant trees. So there are too many variables to give a definitive answer.
Trees prevent soil loss so the road stays stable because of the trees planted on both sides.
trees are not so much born.. but they grow from seeds which can be planted or fall from other trees
So that soil eroison(when soil goes into drinking water and poisons it) becomes less of a problem
if their small enough they can be planted by hand but if their to big their usually planted by machines so there really is no right or wrong answer to that question
Well the trees provide us with oxygen, and we provide them with carbon dioxide. So if you planted more trees, we'd have more oxygen and they'd have more carbon dioxide! :D
The large trees steel the water, so the small plant suffocates.
Malaysia, Indonesia, Ghana, Cote D'Ivore, Nigeria, Brazil, Ecuador, Australia so 8 countries.
they can withstand the weather so they sprout in the Deciduous Forest
An equilateral triangle with three trees at the angles, 3 bisecting the legs and one directly in the center.
In the interior, they are old and so large. For places, the plenty of sunshine and rainfall in the tropical climate helps.