Alexander555,
About the concern you have over using fossil fuel products to make clean ones:
Say you are building a housing development. You want to make them all net-zero-energy houses. Do you wait years until you can manufacture them entirely with clean energy and sustainable products? Or do you build them now, with the most sustainable items and energy you can. The houses are going to be built anyway. Making them net-zero now brings us that much closer to the future we need.
Say you are a farmer. You want to change your practices to make your crops be certified organic, but to do that your fields must be chemical-free for three years. Any crops you grow during that time will produce less, but you can’t sell them as organic, so you’ll lose money. That makes it hard for farmers to go organic — and why there is a market for “transitional” crops, which are not certified organic, but are valued for their cleaner approach. And we end up with more organic crops and less chemicals on the environment.
The Tesla battery Gigafactory in Nevada will eventually be run entirely on clean energy — solar panels on the roof (of the $5 billion building with the biggest footprint in the world), wind turbines on the nearby hills, thermal storage on-site. But Tesla is already moving us closer to sustainable transport, by making batteries and parts for zero-emission cars in the 1/3 of the building that has been constructed so far. The planet — and Tesla’s finances — can’t wait! But the eventual result will be a cleaner future, sooner. With more and cheaper EVs, and fewer ICE vehicles!
We can’t switch to 100% sustainable energy in a day. But we will continually decrease our need for fossil fuels — and increase our use of clean energy and clean products which are cheaper and more widely available than ever.