Growing more trees helps to ___________.
Plants use CO2 for photosynthesis during the day . But at night , they also respire ,i.e.,take in O2 and release CO2 into the air . This doesn't help much in the reduction of CO2 . Then why do people ask to plant more trees ? Is there a more effective method to reduce CO2 in the air ?
It is known that exposure to carbon monoxide is harmful to animals because
(a) it reduces CO2 transport
(b) it reduces O2 transport
(c) it increases CO2 transport
(d) it increases O2 transport