Question

In ancient times, wood and animal dung cakes were taken in use as a fuel. Now a days, LPG has taken its place in our kitchen being a good source of energy. Students are asked to compare both fuel aEasy to transport & store / ਸਟੋਰ ਕਰਨਾ ਤੇ ਇੱਕ ਥਾਂ ਤੋਂ ਦੂਜੀ ਥਾਂ ਲਿਜਾਣਾ ਆਸਾਨ ਹੋਵੇ/स्टोर करना और परिवहन करना आसान है
Should be cheaper/ ਸਸਤਾ ਹੋਵੇ/सस्ता होना चाहिए
Pollution free / ਧੂੰਆਂ ਨਾਂ ਪੈਦਾ ਕਰੇ/प्रदूषण मुक्त
All of the above/ ਉਪਰੋਕਤ ਸਾਰੇ/उपरोक्तnd analyze the qualities of a good fuel from following. ​

Answer 1

Pollution free

Explanation:

Wood has been a traditional fuel for both domestic and industrial use. However, it produces a lot of smoke that can cause respiratory problems and, fuel efficiency of LPG is more than that of wood