Question

help anybody please

Answer 1

You notice green scum floating on the surface of a pond. How can you tell whether these organisms are plants? (5 points)

20. Explain, using an example how water may become polluted (3 points)

21. Why is conservation important today? (3 points)

22. Most people drive cars and heat their homes with petroleum, coal, or natural gas. Why is it important to find alternatives for these sources of energy? What are three examples of alternatives? (3 points)

23. Describe how burning fossil fuels has created an imbalance in the carbon cycle.

(2 points)

Answer 2

For number 20. look at this website: http://www.explainthatstuff.com/waterpollution.html
For number 21:There are a lot of people on this planet and we are using resources at a fantastic rate. From a selfish point of view, the more we use, the less there will be in the future and the less comfortable our lives will be.

Answer 3

Do not answer this question. This is a cheating student who will suffer penalties shortly.