阅读理解One old-school gardening belief is that it is inadvisable ——even risky —to have plants in the bedroom. This centers around the claim that while plants take in carbon dioxide and release oxygen in the day, at night this is reversed(相反), so they compete with us for the very air we breathe while asleep.Indoor air quality is indeed affected by CO₂ buildup, which has proven health implications, providing a clear basis for concern. However, assessing whether sharing our bedroom with plants truly jeopardizes our health involves three key considerations.Firstly, how much CO₂ do plants release at night compared with what they absorb in the day? This proves complex due to varying factors like species, light exposure, and room temperature and the research on the precise measurements is pretty thin on the ground. Thankfully, a 2015 study found that sizeable houseplants enclosed in glass boxes manage to absorb six to eight times as much CO₂ in the day as they give off at night, creating a pretty significant net reduction over a24-hour period.Secondly, it's essential to compare the nighttime impact of plants on air quality with that of other potential competitors, such as your roommates. A single human breath contains roughly40,000 ppm of CO₂, over 10 times the effect a plant could have in 8 hours. Consequently, it might be wiser to kick out your roommates before your plants.Finally, and this may seem apparent, our living spaces differ from the controlled environments in research studies. Indoor air is constantly being exchanged naturally through openings like doors and windows, and human movement. A recent review suggests that reproducing the air-refreshing impact of an open window would require between 100 and 1000 plants per square meter of floor space, considering plants' pollution-removing abilities.So enjoy houseplants whenever you like, because, frankly, if sleeping near plants were bad for your health, camping in a forest would be positively deadly.
(1)
What does the underlined word in paragraph 2 probably mean?
A . Threatens.
B . Changes.
C . Improves.
D . Suspends.
(2)
What does the author think of having plants in the bedroom?
A . It is a health risk that requires immediate action.
B . It is a dangerous practice that should be avoided.
C . It is not as concerning as believed and can be enjoyed...
D . It is beneficial only if proper air exchanging is ensured.
(3)
How does the writer illustrate the nighttime impact of bedroom plants?
A . By citing examples.
B . By giving definitions.
C . By quoting researches.
D . By making comparisons.
(4)
Why does the writer mention camping in a forest at the end of the passage?
A . To highlight the risks of sleeping outdoors.
B . To suggest that sleeping near plants is dangerous.
C . To promote forest camping as a healthy alternative.
D . To emphasize the safety of having plants in the bedroom.
答案: A
C
D
D