Herding is an example of

a.
a new economic practice in africa
c.
an economic process that is no longer viable in africa
b.
a traditional economic practice in africa
d.
none of the above

These are resources that cannot be renewed after used. examples include coal petrolium and gas

Air pollution: “combustion results in gases such as nitrogen oxides, nitrogen dioxide and particulates. the main causes of air pollution include transport, domestic combustion and industrial processes. pollutants from these sources can cause problems in the immediate vicinity and a distance away.”

This type of energy is called radiant energy.