How many trees are there in the whole world?
It's impossible to give an exact number of trees without leaves in the world. The number fluctuates constantly based on the time of year and the specific type of tree. Many trees lose their leaves seasonally, while others remain evergreen.
Why are there trees?/ Why do we need trees?
Why is the grass green?
Soil looks brown because it is full of dead plant and animal matter that has been broken down by microbes. The carbon in this matter reflects back a brown colour. - https://www.scienceabc.com/nature/why-does-soil-always-look-brown.html
Why Do Flowers Have Different Colours?
How do plants grow?
Why are leaves green?
How do trees grow?
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