I agree too, except for a reservation about his list of clean energy sources - solar, hydrogen, gas, wind, geothermal, hot rocks, tide.

Hydrogen - clean credentials depend on how it's produced, and as has often been noted it is only an energy carrier (and less than 100% efficient at that) rather than a primary source of energy.

Gas - natural gas can only be considered as less damaging than other fossil fuel, certainly not "clean". Biogas is better in this respect, but again debatable how clean it is in overall terms.

And I'd add wave to the list.