Can any source of energy be pollution - free? Why or why not?

What is a good source of energy ?

Debate the following issue in class. It is estimated that the sun will last for another five billion years. Do we have to worry about solar energy getting exhausted ? Why or why not ?

If you could use any source of energy for heating your food, which one would you use and why?

State whether the following statements are true or false Exploiting any source of energy disturbs the environment in some way or the other.

Iodine can not be used for electro philic substitution of arene. Why?

Can ground water get polluted by sewage? How?

Name any two good sources of vitamin A.

Is bio - mass a renewable sources of energy?