Trees help the environment, they make oxygen from carbon dioxide. We should plant more because we are constantly chopping down trees to get wood, and planting more helps to ensure that will we will have trees in the future.
Answer:
Obligate anaerobe an organism that can grow only in the complete absence of molecular oxygen.
Answser
it migth be B i am not sure
Human diseases can decimate animal populations, from such well-meaning activities as ecotourism.