Question

Governments have already taken action against air pollution by introducing ________.
(A) Solar energy
(B) Wind energy
(C) Renewable energy
(D) All the above

Answer 1

Hint : The air situation in New Delhi is unavoidable, and there appears to be no end in sight. While the problems in New Delhi garner greater media attention, other Indian cities have poor air quality. Essential Indian and foreign experts convened in New Delhi to underscore the public health urgency and outline key steps cities can take immediately to combat fatal air pollution in order to speed up action.

Complete Step By Step Answer:
Solar energy is the radiant light and heat from the Sun that is captured by a variety of ever-evolving technologies including solar heating, photovoltaics, solar thermal energy, solar architecture, molten salt power plants, and artificial photosynthesis. It is an important source of renewable energy, and depending on how it captures and distributes solar energy or converts it to solar power, its technologies are classified as passive or active solar. To harness the energy, active solar solutions include photovoltaic systems, concentrated solar power, and solar water heating.
Wind power, often known as wind energy, is the utilisation of wind turbines to generate mechanical power, which is then used to spin electric generators to generate electricity. When opposed to burning fossil fuels, wind power is a popular sustainable, renewable energy source that has a significantly lower environmental effect. Many individual wind turbines are linked to the electric power transmission network to form wind farms. Onshore wind is a low-cost energy source that is competitive with, and in many cases, cheaper than, coal and gas facilities.
Renewable energy is usable energy derived from renewable resources that are renewed naturally on a human timeframe, such as carbon-neutral sources such as sunshine, wind, rain, tides, waves, and geothermal heat. In contrast to fossil fuels, which are depleted considerably faster than they are regenerated, this form of energy source is renewable. Although the majority of renewable energy is sustainable, some of it isn't; for example, some biomass isn't.
Hence option D is correct.

Note :
While many renewable energy projects are large-scale, renewable technologies are also well-suited to rural and isolated places, as well as developing countries, where energy is frequently a critical component of human development. Because most renewable energy methods generate electricity, they are frequently used in tandem with additional electrification, which has numerous advantages: electricity can be converted to heat, mechanical energy may be converted with great efficiency, and it is clean at the point of consumption. Furthermore, electrification based on renewable energy is more efficient, resulting in considerable savings in primary energy use.