Manufacturers such as coca cola are to blame 100%. They order the manufacture of billions of these bottles at the start of the supply chain. They can choose to funnel money into r&d, use only recyclable cans or glass but they choose plastic everytime because they claim its what the customers want. No one pushes back and the guilt is always levelled onto the consumer.

We still cannot explain gravity in fundamental terms. We know how it effects things and where to find it but cannot describe at a fundamental level what it is. Once we can learn how to effect/ manoeuvre gravity for/ around man made objects then we’ll see developments in actual travel and speed.