闻起来的味道有化学物质的成分.火的颜色是橘黄色的.非常的难烧,味道很臭.会有大量黑烟冒出.烧到一半会自己熄灭.灰烬是黑色的.

Smells like chemical substance.Orange fire color.Hard to ignite,strong smell.Emits a great amount of smoke.Extinguishes when half burnt.Black ashes.
Conclusion:we are fooled,it is man-made.