RWE AG, which owns six facilities using the dirtiest fossil fuel, has obligations to workers and municipal shareholders that will prevent quicker efforts to close coal capacity.

Thousands of Turks, including opposition lawmakers, have been protesting against the mine, saying the company would use cyanide to extract gold, contaminating the soil and waters of a nearby dam.

The future of the company and its huge fertilizer project beneath the park were thrown into doubt last month, after Sirius’ $2.5 billion funding plan failed.

A Responsible Sourcing Network study analyzed 215 companies’ disclosures.

Dyson said his engineers had built a "fantastic car" and that the project was not being closed due to any failures in research and development.