Describe DDT and summarize the history of the use and banning of DDT, including actions taken by the US government. State the major reasons for spraying DDT and for banning it. State three or more ways science has played a role in the controversy.

Which statements explains what the fossil records indicates? check all that apply. a) earth is 4.5 billion years old b) many organisms have become extinct c) mammals have always existed on earth d) mass extinctions have occurred several times on earth e) the amount of water on earth has decreased over time?