Best energy alternatives to stop global warming

[Nibb31]

Could you provide some numbers/examples of that?

The EELV program was initiated because the Titan and Atlas launches were way too expensive:

In 1990, the Titan IV Selected Acquisition Report estimated the total cost for the acquisition of 65 Titan IV vehicles over a period of 16 years to US$ 18.3 billion (inflation-adjusted US$ 33 billion in 2014).[12] The last Titan 401a launch that exploded cost 1.3 billion dollars.

Atlas and Delta launches costs around $100 to $150 million. Falcon is somewhere between 60 and 100 million.

I don't have the figures for Ariane, but Ariane 5 is much cheaper than Ariane 4.

[SargeRho]

The Ariane 5 ECA is 120 million per launch, Ariane 4 anywhere from 40 to 110 million depending on Payload.