Is CNG really pollution free? Why or why not?
CNG
CNG is not pollution-free
Can any source of energy be pollution-free? Why or why not?
what is a diamond really if it is the pure form of carbon so why it is so costly or precios ,the diamond is poisnous or not if yes then why or if no then also why
why banana tree is not really a tree
Why CNG is not used everywhere?