which of the following provides evidence that a warming planet is related to human behavior (select all that apply; there are one to four possible correct answers)? scientists showing that increasing levels of carbon dioxide cannot impact our climate scientific research showing that temperatures have risen along with carbon dioxide emissions from the nineteenth century scientists agreeing that the earth can only sustain an atmospheric concentration of carbon of about 39,000 parts per million scientific discoveries that burning coal changes the climate by increasing the levels of carbon in the atmosphere
