This is somewhat true, though obviously misleading.

Since natural gas's energy efficiency is much higher than that of coal or oil, the amount of carbon dioxide released is the same for a greater amount of energy. Furthermore, it requires less carbon input to retrieve the natural gas.

Also, in order to use solar or especially wind, you need a form of electricity generation which can ramp up quickly when the wind dies. Until we get large-scale battery storage, that means natural gas turbines.

It is cheap - see the huge fall in gas prices since the introduction of fracking. The US has gone from being a net importer of natural gas to an exporter, such is the increase in supply.

"Secure" doesn't mean "is never going to run out", but rather that we don't have to rely on other countries from it. The UK can meet some of its natural gas needs with local fracking, reducing the need to import gas.

(And other commenters have addressed the low carbon thing)

All true. But note that GP didn't say that they've stopped spinning started speaking the complete truth about fossil fuels--only that they have stopped denying its link to global warming.

Some gas is renewable, though, so definitely low carbon. And over here it's even fairly cheap (for vehicles, considerably cheaper than gasoline).

You can replace the reason any corporation does things with $profit and it will almost always make sense.