S1: | Metals are today being replaced by polymers in many applications. |
P : | Above all, they are cheaper and easier to process making them a viable alternative to metals. |
Q : | Polymers are essentially a long chains of hydrocarbon molecules. |
R : | Today polymers as strong as metals have been developed. |
S : | These have replaced the traditional chromium-plated metallic bumpers in cars. |
S6: | Many Indian Institutes of science and Technology run special programmes on polymer science. |
S1: | What are the causes of our chronic food shortage? |
P : | To find for these growing new millions is desperate task. |
Q : | every year, we add more than a crore of persons to our population. |
R : | Despite stupendous efforts by our government, the population is growing unabated. |
S : | The chief cause is the population explosion. |
S6: | This unprecedented growth can drag us to the doors of starvation very soon. |
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