Forests are useful in fighting the effects of air pollution because they produce . A. carbon B. oxygen C. hydrogen D. carbon dioxide

Select the correct answer from each drop down menu. among these figures figure and blank have the same volume. 1 a c e 2 b d

The lines marked by the letters a, b, and c on the map above represent a. chains of volcanoes b. earthquake fault lines c. thin strips of heavy forests d. major rivers that flow from north to south

What is the hottest recorded temperature on earth