Which of these show a result of deforestation and its effect on the environment?
`{:("Result",,"Effect"),("(a) Fewer flowering plants",-,"Reduced "CO_(2)" in air"),("(b) Fewer trees",-,"Increased bumidity of air"),("(c) More ground cover",-,"Wind removes soil"),("(d) More water drains away",-,"Soil washed away"):}`

As a result of greenhouse effect , there can be : A: an increase in rate of evaporation of water thus, untimely more rain , flooding . B: tropical storms in certain parts of the world C: a decrease in pH of the soil D: an increase in pH of the soil select correct altenate :

CO_2 and H_2 O absorbs strongly in the infrared rrgion and its presence in the atmospheere dectrases the loss fo heat form the enrth by radistiion . This global warming is called the greenhouse effect (other gases , including the oxides of nitraongen form car exhauset freons from aerosols and refrigeratirs and methane from bacteria in the soil and in the rument cows , also add to the reeenhouse effect ). The concentration fo atmospheric CO_2 has increased by 10% . The is rsulting in the increase in the mean temperature fo the earth by 2. 5^@ C , varying form 2^@ C t the equlator to 4^@ C at the poles . This could have dramatic effects on the climate. As a result of freenhouse effect , thers can be : A: an increase in rate of egvaporation of water thus, untimely more rain , floodingn tec . B: tropical storms in certain parts of the workd C: a decrease in pH of the soil D: an increase in pH of the soil select correct altemate :

Noise is a common problem in both urban and rural areas, traffic noise in particular. Trees and shrubs are not only visually attractive but also can make effective noise barriers. Therefore when space permits we have to plant more trees and shrubs in areas where there is noise problem. By doing this noise can be reduced by six decibels over a distance of 30 metres. The only thing we have to keep in mind is that the planting should be particularly dense, the trees which have dense foliage and relatively vertical orientation of arrangements should be planted. It will completely screen the source of noise. If there is any gap in barrier it will still allow noise to penetrate. Single layer of trees is worthless as a noise barrier. Due to inter-reflection, multi-rows of trees are more effective. The planted trees must be taller. We can reduce noise level by 1.5 decibels with each additional 3 feet of tree height When the opportunity to use trees is restricted a combination of shrubs and tall grass can be used. Instead of tarmac or gravel surfaces soft grass ground cover is preferable. It will absorb noise rather than reflect it. Rows of trees, shrubs, crotons, ground covering plants, climbers and their flowers not only reduce noise and provide a beautiful backyard they also help block wind, provide shade, and absorb traffic pollution. Higher the trees