Question

Why do we need food?​

Answer 1

Explanation:

A food is something that provides nutrients. Nutrients are substances that provide:

• energy for activity, growth, and all functions of the body such as breathing, digesting food, and keeping warm;

• materials for the growth and repair of the body, and for keeping the immune system healthy.

• There are many different nutrients.We divide them into:

• Macro (big) nutrients that we need in large amounts. These are:

• carbohydrates (starches, sugars and dietary fibre);

• fats - there are several kinds (see Box 4);

• proteins - there are hundreds of different proteins.

• Micro (small) nutrients that we need in small amounts. There are many of these but the ones most likely to be lacking in the diet are:

• minerals - iron (see Box 6, page 19), iodine and zinc;

• vitamins - vitamin A, B-group vitamins (including folate) and vitamin C.

Answer 2

Answer:

The concept of a smart city differs from state to state and country to country but the basic structure of smart cities is to ensure that the city provides core infrastructure and give a decent quality of life to its citizens. The element of a smart city is to include assured water and electricity supply, sanitation and solid waste management, efficient urban mobility and public transport, robust IT connectivity, e-governance and citizen participation, safety and security of citizens, efficient energy & green building, smart parking, intelligent traffic management system.

With the initial focus being on energy efficiency, public safety, and sustainability, the cities will soon graduate to build solutions around health, education, and system integration spanning all sectors. The ideal city of the future will combine wireless connectivity with the traditional concepts of community and shared space. IoT solutions are essential to manage everything from sanitation and water to transportation, communications, infrastructure, waste management, and a sustainable environment.

Many cities around the globe are joining the Smart City bandwagon and the Prime Minister has announced the building of 100 smart cities by 2030. The Government of India allocated Rs. 70.6 billion (US$1.2 billion) for Smart Cities in Budget 2014–15. Although, the Smart Cities program seems a great idea but there are still concerns with it.