Robina,
What is peak off peak?
Come on - normal peak-off-peak demand. At daytime all factories, machines, bulbs, etc are on - not so much at night. If all the plant does is pump gigawatts the supply is overwhelmed at peak and vice versa. On-plant storage solves this. There are solutions for home power storage too for solar houses. Basically power inefficiencies are being solved.
I have heard American cows add more than a fair share to global warming with flatulence. How do you solve that? We become vegetarians?
Living organisms have done this since eternity - it's vehicles, factories & plants that use gasoline, coal, nuclear, etc that are heating the earth.