• A. diseases of the cardiovascular
• B. have a body shape that all people Will admire
• C. longer life-time
• D. digestive system disease
• E. a shorter life span
• F. pneumonia and influenza

A great many people go on diet to______.

A．It was produced from plants.
B．It was not a greenhouse gas.
C．It was produced in oxygen-free environments.
D．It traps more heat than any other greenhouse gas.