While natural gas is formed primarily of methane, it can also include ethane, propane, butane and pentane. The composition of natural gas can vary widely, but below is a chart outlining the typical makeup of natural gas before it is refined.
Roadside Dispatch-Roadside assistance is another service by Visa Signature. However, unlike similar services provided by American Express or MasterCard, there is a $59.95 service call. But the service includes towing, jump-start service, lock-out service, fuel delivery and whiching.
1 24-hour Visa concierge service. 2  Benefits: Zero Fraud Liability Protection, Travel Accident Insurance, Warranty Manager, Travel & Emergency Assistance and Auto Rental Collision Damage Waiver. 3  If you do not qualify for the Signature card, you will be considered for the Platinum card.