Volcanic gases and ash are two examples of secondary pollutant
A secondary air pollutant is a pollutant which results from two different contaminants in the environment. A classic example is the formation of photochemical smog when hydrocarbons and Nix mix in the presence of ultraviolet light. A similar effect results when, from two separate industrial processes, chlorine gas mixes with aromatic hydrocarbon vapours to make a lachrymator (tear gas)
primary and secondary
Examples of primary fuels - wood, coal Examples of secondary fuels - charcoal, coke
primary and secondary consumers
Two examples of primary data are survey responses collected directly from individuals and experiments conducted to gather specific data. Two examples of secondary data are data obtained from government reports and data collected from previous research studies.
I suppose crocodiles and alligators are two examples.
wind and water
suck it
examples of secondary consumers include a hawk, snake, or mountain lion secondary consumers are animals on a food chain that don't get eaten.
list two examples of how animals use sounds that people cant hear.
IPX/SPXAppletalk
1.lightning2.sparks of static electricity