以下是您提供的文本中发现的拼写错误、单复数误用及标点错误： 1. "lmpact" 应为 "Impact"（拼写错误）。 2. "coal resource" 应为 "coal resources" 在提到多种资源时（单复数误用）。 3. "how to reduce the coal pollution to the environment" 应为 "how to reduce coal pollution on the environment"（不当用词，改为更自然的表达）。 4. "therefore, on the precondition of clearing the supply-demand relationship" 可以考虑把 "the" 去掉，改为 "on the precondition of clearing supply-demand relationship"（语法和风格）。 5. "50 percentages" 应为 "50 percent"（不当用词）。 6. "boosting of clean and efficient utilization" 应为 "boosting clean and efficient utilization"（不当用词）。 7. "are fueled by block coals" 应为 "are fueled by block coal"（单复数误用，coal在此应为不可数名词）。 8. "with the national emission regulations" 应为 "with national emission regulations"（去掉 "the" 更为自然）。 9. “the resistance against the national emissions regulations”中的“the”可以去掉，变为“resistance against national emissions regulations”以使其更为流畅（冗余）。 10. "the comprehensive operation cost reduces by 20~30%" 应为 "the comprehensive operational cost is reduced by 20~30%"（益用词不当，语法错误）。 11. "and to speed up the promotion and application of high-efficiency and environmental-friendly pulverized coal boilers" 中的 "and" 前可以考虑加上 "to" 作为并列结构。 请根据以上建议进行相应修改。