Why the climate is colder close to the north and south poles than it is at the equator

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

If a polyatomic ionic compound has gained two hydrogen ions, then how does its name begin?

The human activities in two locations are described below: location a: rampant use of plastic containers location b: excessive use of pesticides and fertilizers which statement is most likely true? location a will have poor air quality because plastic is biodegradable. location a will experience water scarcity because plastic absorbs moisture. the population of honeybees will increase in location b because production of crops will increase. the population of fish in location b will decrease because the water is contaminated.