The second one is A, amount of time
Personally I would say it's A (apart from the installation costs which may make it a little expensive) but it does involve certain aspects of D also as wind energy doesn't cause pollution. So either A or D!
Hope I was of help! :)
I need the choices to be able to help you...
The answer to your question is d :)
Debido a su gran tamaño y sus características geográficas, en algunas culturas, América se divide tradicionalmente en América del Norte, América Central, y América del Sur. Algunos geógrafos consideran a América Central como una subregión dentro de América del Norte
