The air we breathe is mostly oxygen and carbon dioxide. a.) true b.) false

The air that we breath is about 20% oxygen, and small amounts of carbon dioxide. Since the air is 78% nitrogen I would say false. Also, I would say false because we inhale oxygen then exhale carbon dioxide for plants to inhale, then they exhale oxygen for us. Its the circle of air. So when the question asks if the air we breath is mostly oxygen and carbon dioxide it is wrong cause we dont breath in carbon dioxide, I mean we do breath it in but we dont use it. We just exhale it back out. Just take what i have right now before I confuse you :)

Hope I helped :)

Answer sessenta por cento de todos os vulcões ativos ocorrem nas fronteiras entre as placas tectônicas. A maioria dos vulcões é encontrada ao longo de um cinturão, chamado de “Anel de Fogo”, que circunda o Oceano Pacífico. Alguns vulcões, como os que formam as ilhas havaianas, ocorrem no interior das placas em áreas chamadas de “pontos quentes”.

Explanation: