Es subproducto de la combustión incompleta de materiales orgánicos (es decir que contienen carbono) como madera, aceite combustible, plásticos y desechos de los hogares. 30 veces más pequeñas que el diámetro de un cabello humano, por lo que puede entrar más rápido al sistema respiratorio y generar problemas en la salud de las personas:

Read the excerpt from gilgamesh: a new english version. gilgamesh said, "courage, dear brother, this is no time to give in to fear. we have come so far, across so many mountains, and our journey is about to reach its goal. you were raised in the wild, with your own hands you have killed marauding lions and wolves, you are brave, your heart has been tested in combat. though your arms feel weak now and your legs tremble, you are a warrior, you know what to do.” what characteristics of an epic hero does gilgamesh demonstrate in this excerpt? check all that apply. leadership courage honesty triumph in battle compelling speech