Green energy is not solar power and wind turbines. It’s the gradual improvements in electronics over the last thirty years. There’s probably been more saving of energy through efficicienes created through the invention of new devices than that created by all the solar panels and wind turbines in the whole world.
As an example this is the power supply for an old Apple III. Big, chunky, wasteful of energy, generates lots of heat, and expensive to make.
Compare that to the latest Apple power supply. One for your iPhone/iPad. This one is tiny. And I mean tiny, it’s an inch cube. It’s also extrmely efficient in terms of energy use, both while charging and when not. And because it doesn’t use much energy it stays cool. And lastly it’s very cheap to make, at around $4 each.
Continual improvements in engineering have also done a lot for green issues. Wind power will do nothing towards saving the planet as it only provides something like 1-2% of the UK’s energy. Photovoltaic solar power in the UK just does not work what with our typical weather. Hydro does work – a little. It’s just that we don’t have huge rivers able to provide more than a few percent of the UK’s energy.
If we don’t want to cut back our energy consumption to levels in the pre-industrial age then we have to live with gas, coal and nuclear providing over 90% of the UK’s energy. We can cut back our energy usage by small levels by switching our lights off and also by buying more efficient electrical products. For instance, modern TVs in use as much as power as old TV used in standby.