Answer:
it is highly explosive is the correct answer.
Step-by-step explanation:
Methane gas must be removed from landfills because it is highly explosive.
Methane gas is highly explosive because it carries chemicals that are present at an explosive level.
Methane gas concentration in landfills is about 50 percent higher than its Upper Explosive Limit and it is expected to cause an explosion hazard.
landfill gas(methane gas) is produced due to decomposing the waste in landfills and landfills gas is dangerous as it results in the greenhouse effect.