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.
Overall, Visa Signature and World MasterCard are very similar. They both offer services and benefits exclusive to cardholders only. They each offer their own concierge service, emergency travel assistance, rental car insurance, shopping protections, and a variety of travel packages and deals.