Answer:
Maybe sunlight? There's not that much context to go with this question
Answer:
antibodies to a disease bacterium
Explanation:
The charcoal produced by the burning of the woods provides nutrients for reforestation.
<span>The building from the list provided with the highest likelihood of air pollution is a tightly sealed house with an unvented water heater. The school with leaks will let air exchange happen so that isn't it, and having a carbon monoxide detector only reports existing air pollution it doesn't prevent air pollution, it could have issues but we don't know. The tightly sealed house with the unvented water heater is a near sure thing.</span>
