Renewable resources, like the one mentioned in number five or often not considered fully substantial why

This is because renewable resources are typically variable in their availability and can be affected by factors such as weather patterns and seasonal changes. This makes it challenging to rely solely on renewable resources for consistent and reliable energy production. Additionally, the technology required to harness and use renewable resources can be expensive and not always efficient, further limiting their widespread adoption. Despite these challenges, investing in renewable resources is essential for reducing our dependence on fossil fuels and mitigating the impacts of climate change.