What is the fine-grained topic of the following text: It burns more consistently as well; Softwood will burn real hot & real fast then die-down to nothing in a short period of time, leaving little-to-no coals behind; While hardwood will keep a good coal base, making it easy to add more wood to your fire and allowing your fire to burn smoke-free through-out the evening. Only return the topic.
Comparing burning properties of softwood and hardwood