Group 1 - The core viewpoint of the article is that Birchtech has adjusted its IPO plans, now aiming to raise $20 million by offering 5.4 million shares at a price of $3.67 each, down from the previously proposed $4.15 per share for 4.8 million shares [1] Group 2 - Birchtech specializes in air and water purification systems, utilizing proprietary activated carbon technology focused on mercury emissions capture for coal utility sectors, with 16 power generation units in the U.S. currently using this technology [1] - The company targets the drinking water market with innovative adsorbent technology to address issues related to PFAS and is supported by two dedicated R&D centers located in Pennsylvania and North Dakota [1] - Birchtech believes a significant number of coal-fired power plants in the U.S. are infringing on its patented SEA process and has actively pursued patent litigation since 2019 [1]