Problems with CNG as the only fuel for automobiles is

(1) Difficulty in laying down pipelines for the distribution of CNG

(2) Difficulty in ensuring uninterrupted supply

(3) Can be siphoned off by thieves

(4) Both A and B

(1) Phasing out of old vehicle

(2) Use of unleaded petrol

(3) Use of low sulphur petrol and diesel

(4) Use of electrostatic precipitator in Vehicles

(1) Reducing sulphur and aromatic content in petrol and diesel fuel

(2) Reducing lead in petrol

(3) Increasing CNG use

(4) All of these

(1) Euro II Norms

(2) Euro III Norms

(3) Euro IV Norms

(4) Euro I Norms

(1) 42 per cent

(2) 150 ppm

(3) 50 ppm

(4) 30 per cent

(1) 0.01%

(2) 0.1%

(3) 0.2%

(4) 2%

(1) Bacteria and Other microbes

(2) Industries

(3) Lichens

(4) All of these

(1) Presence of large amount of nutrients in water

(2) Excessive growth of free floating or planktonic algae

(3) Distinct color to the water bodies

(4) All of these

(1) Algal bloom cause deterioration of the water quality and fish mortality

(2) Some bloom forming algae are extremely toxic to human beings and animals

(3) Sewage discharge causes mortality of fish and other aquatic creatures

(4) Beautiful orange colored flowers have caused havoc in India because of their faster growth

(1) Eichhornia crassipes

(2) Introduced in India for their lovely flowers

(3) Have mauve colored flowers

(4) Does not has any characteristic shape