merits
| • no harm to person
• no greenhouse effect
• no damage to ozone layer
• clean
• big volume
| • no harm to person
• no greenhouse effect
• no damage to ozone layer
• clean
• less volume than
water
| • no harm to person
• no greenhouse effect
• no damage to ozone
Layer
| • harm to person
• greenhouse effect
• damage to ozone
Layer
• Halon, less volume
than CO2
|