Could you explain why (D) is wrong?

Hi @ryaanibtisam@gmail.com D is incorrect because it claims that a reduction in emissions "will be achieved by the careful design of new factories." The passage is discussing "using clean coal technologies to 'repower' existing factories." While the careful design of new factories will also have an impact on emissions, this cannot be inferred from the information given in the passage and is, therefore, incorrect. Hope this helps! Please let us know if you have any further questions.