Answer:
I think it is rivers because you can't drink out of the ocean and lakes are nasty aquifers are usually smaller so rivers would be most likely
Explanation:
One of the main factors that unites the different nations of the Europe into a single "Eurozone" is an economic one. It is much easier for all nations to have a single currency than for each nation to have its own. This was a major unifying factor.
Answer:
It is all important
Explanation:
Mostly: Scientists can analyze changes in chemical concentration of atmospheric gases because this is how we live breath and are present with the moment