Controversial plans to sink a mile deep mine shaft and create a 1,000 jobs in the heart of the North York Moors National Park near Whitby are expected to be decided today.
Mining firm Sirius Minerals wants to dig billions of tonnes of potash - a type of fertiliser - from beneath the moors and seabed.
But dozens of environmental groups say the mine will harm one of the region's finest landscapes and damage the vital tourism industry.
200 new workers have been taken on at the country's biggest potash mine as part of a major expansion.
Cleveland Potash is investing £300m at its site near Saltburn and says it will increase production and help secure of the mine for another 40 years in the future.
1100 people are currently employed by the company, which is looking to recruit another 85.
It mines potash and polyhalite used in fertilisers and extracts salt which is used to grit the roads.
As well as employing local people, the firm is drawing from a pool of experienced former miners to make sure it can meet demand.
The biggest employer in East Cleveland has announced that it has secured its future for the next 40 years.
New undersea reserves mean the Cleveland Potash mine will now be taking on hundreds of new workers, as Derek Proud reports.
You can watch his full report below.