... the blue litmus paper turns red and has a pH of less than 5.6, the water is acidic, if not the water is not acidic. Though this experiment has to be repeated a couple of time for better results. Now, we know everything about acid rain. We should now try to improve the environment we stay in, inform other people about acid rain and ... ...

• Word Count: 1710
• Approx Pages: 7
• Has Bibliography
• Grade Level: High School

OVERPOPULATION In the past couple centuries, population has exploded; for example, around the year 1800 the world population was about one billion, it now currently rests at just over six billion. The effects of overpopulation ... ...

• Word Count: 1888
• Approx Pages: 8
• Grade Level: High School