1.) what are some cleaner options to produce energy? How do they work? 2.) what are the effects of air pollution on the environment and people?

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".

we need additional information in order to determine the cause of death for anna garcia. there are at least 3 things with explanation included as to why we need them are as follows:

sound moves fastest in solids because the molecules are tightly packed and it allows sound to vibrate