- Vespene Energy Closes $4.3 Million Funding Round to Pioneer Carbon-Negative Bitcoin Mining Using Captured Landfill Methane https://www.prnewswire.com/news-releases/vespene-energy-closes-4-3-million-funding-round-led-by-polychain-capital-to-pioneer-carbon-negative-bitcoin-mining-using-captured-landfill-methane-301601766.html 2 comments bitcoin