Can someone tell me how much computing power would be needed for someone to hit the 28-characters "AndCausingCLimateChange6666" in address ?
With Tools like Vanitygen or VanitySearch.
That is an enormous number of possible combinations, roughly equal to 7.5 × 10^48.
To generate a 28-characters in address, it could take trillions of years on a single consumer-grade GPU.

These addresses are all generated through hash160 encoding, and the sender may not necessarily have the private keys corresponding to these addresses. This is quite easy to achieve, as it only requires the generated address to meet the checksum. For example, I can generate 1AndCausingCLimateChange8886BkGrY or 1EasyToDoThisForExampLe6666CLMvzd. Refer to the method used for generating black hole addresses, such as: 1111111111111111111114oLvT2.