Justify the following answer.
(a) The conversation of endangered species of plants and animals in necessary.
(b) Pollution Under Control (PUC) certification is mandotary for all vehicles and industries.
(a) Conservation of endangered species of plants and animals is necessary to preserve biodiversity and to maintain the ecological balance, as once extinct then they are gone forever and then no factor can compensate for the consequential ecological crisis. (b) The goal, according to the roadmap, is to reduce sulfur to 50 ppm in petrol and diesel and bring down the level to 35 percent. Corresponding to the fuel, vehicle engines will also need to be upgraded. It is mandatory for every vehicle owner to carry a valid 'Pollution Under Control' (PUC) certificate, so as to comply with the prescribed emission norms.