Why do we choose not to reduce pollutant from burning coal? There is more energy produce in coals that can produce pollutants.
It is too expensive for companies to reduce pollutants in coal.
Not all countries know how to reduce pollutants from burning coal.
Coal is more efficient and cheaper when it is not filtered.

Which conditions are necessary for natural selection to occur? select all of the answers that apply. a. inheritable adaptations vary among individuals. b. the population size is increasing. c. more individuals are born than can survive. d. fitness varies among individuals. e. the environment changes suddenly and drastically.

Select the word from the list that best fits the definition the temperature to which air must cool to be saturated

The diagram shows a chicken embryo and a human embryo