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

Explain, using an example how water may become polluted

Why is conservation important today?

Question

You notice green scum floating on the surface of a pond. How can you tell whether these organisms are plants? 

Explain, using an example how water may become polluted  

Why is conservation important today?

anonymous · Answer

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?

thomaster · Answer

because these are fossil fuels. They'll run out at some time. And also they cause air pollution. Alternatives are Hydrogen gas, Solar power or biofuels