the major components of environment are natural environment, man made environment and human environment
Silver is natural, human can not made it.
Oxygen is naturally made. It is the by-product of photosynthesis which every plant on the planet undergoes.
A BROOM is a Human-made resource
Oxygen and Hydrogen
An example of a natural disaster would be the earthquake in Haiti. An example of a human-made disaster would be the London Fire.
All objects and materials on Earth are either Natural Resources or human-made. Natural resources come from the Earth, and are not synthesized in any way by humans. Human-made objects are made when humans manipulate natural resources in order to change their function in some way.
Natural...
A thing which was made by man and not natural
The Amazon river/rain forest is a natural feature, not a man made feature.
1. Oxygen is made from...oxygen atoms. 2. Oxygen is a diatomic molecule. 3. Natural oxygen has three isotopes (types of atoms): 16O, 17O, 18O.
what gases? I'll guess that you mean oxygen. Natural source - the air, man-made - none.