Final answer:
Sentences 3 and 5 should be revised or removed to reduce logical fallacies and improve clarity. Sentence 3 generalizes unnecessarily about people's use of fossil fuels, and Sentence 5 speculates on solar energy's potential without practical considerations.
Step-by-step explanation:
In considering which sentences to remove or revise to eliminate logical fallacies and improve clarity in the passage, we may consider both Sentence 3 and Sentence 5.
Sentence 3 makes a sweeping generalization that most people will continue to use fossil fuels unnecessarily without providing evidence for this claim. It implies a causal relationship without justification, suggesting that mere usage means it's unnecessary, which could be considered a logical fallacy. Revision or removal could reduce the bias and improve clarity by, for example, focusing on the challenges of transition away from fossil fuels rather than an implication about people's intentions.
Sentence 5 presents a speculative statement concerning the hypothetical capability of solar installations without considering the practical challenges of such an endeavor. To improve clarity and remove the overgeneralization fallacy, this sentence could be revised to reflect the complex realities of large-scale solar implementation or removed if the passage needs to concentrate on more immediate and practical alternative energy scenarios.