I believe this will help you.
http://www.nairaland.com/703151/why-did-islam-not-spread
Answer:
<em>Any </em><em>4</em><em> </em><em>main</em><em> </em><em>nitrogenous</em><em> </em><em>excretory</em><em> </em><em>products</em><em> </em><em>are</em><em> </em><em>as</em><em> </em><em>follows:</em>
Explanation:
- Carbon dioxide
- Uric acid
- Urea
- ammonia, etc.
The correct answer is letter B, burning wood. This is not a renewable resource of energy as its by-product involves the release of greenhouse gases that can still be harmful to the atmosphere or to the environment in general. All the other choices are good sources of renewable power because they harness the power of naturally occurring materials found in their space.
