$Greenidge Generation Holdings Inc.(GREE)$ Greenidge expects to commence operations in Spartanburg in the fourth quarter of 2021 and expects the location will become the company's second carbon-neutral bitcoin mining operation in the United States. A majority of the electricity at the site is expected to be sourced from zero-carbon sources and Greenidge intends to fully offset all carbon emissions at the site as it continues to expand its bitcoin mining capacity in line with its commitment to environmental leadership in power generation and cryptocurrency operations.