Both the passage and the lecture discuss hydrogen as an alternative fuel source to gasoline. The passage claims hydrogen is an ideal alternative source to gasoline, however the lecturer says hydrogen is inefficient source.

 

First of all, the passage says hydrogen is most abundant element in present, while the lecture disagrees by saying hydrogen is not available in pure form. The lecturer adds that water would not be a good source to create pure hydrogen, since it uses up lots of energy.

 

Second of all, the passage states hydrogen is easier and safer to transport than gasoline. The lecturer refutes this by claiming that hydrogen is extremely dangerous. The lecture also says that hydrogen is much flammable than gasoline, thus can create massive explosion.

 

Lastly, the passage says hydrogen is more efficient than gasoline when used in vehicles. Again, the lecturer disagrees, saying that hydrogen uses up lots of energy. The lecturer says that lots of energy is used during the purification progress of creating hydrogen.

 

 

To sum up, the passage says hydrogen is a good fuel source an alternative to gasoline, while the passage disagrees. First, the passage says hydrogen is abundant, however the lecturer disagrees, saying that pure hydrogen is not available in present day. Second, the passage claims hydrogen is safer, but the lecturer says that it is extremely dangerous. Last, the passage says hydrogen is more efficient than gasoline, where hydrogen use up lots of energy purifying hydrogen