After visiting a factory on a field trip, your little sister is really concerned about her carbon footprint. Name two ways that she can reduce her carbon footprint at home, and explain how it will help the environment.

i am going to guess that it is co2.

"d.) carbon dioxide and hydrogen sulfide"

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".