Science

It's used to make water pipe of all sizes and as conduit and insulation for underground power and communications lines.

If we made HDPE using plastic waste and atmospheric carbon dioxide, using nuclear power as the energy source, we could build a much better world, bringing reliable electric power, clean water, and modern sanitation systems to those who now suffer without these modern necessities.

These basic necessities of modern life do not require exotic and environmentally expensive materials as are found in solar panels, wind turbines, electric cars, batteries, etc..

Clean water can be brought into every home in a plastic pipe, sewage can be conveyed to modern sewage treatment systems in plastic pipe, and electric power can be distributed through plastic insulated aluminum cables buried in the ground. Keep it simple and everyone wins.

If the manufacturing of this plastic becomes a net carbon sink, all the better.