Correct Option (B)
The passage consistently emphasizes that mitigating greenhouse gas emissions is an urgent and unavoidable necessity. Phrases such as "It is essential that we mitigate the emissions of greenhouse gases" and "it is now, therefore, imperative for a country like India" underscore this central theme. The text positions mitigation as the primary action required to avert severe climate change impacts, despite the associated costs, and highlights its significant co-benefits. Therefore, the imperative nature of greenhouse gas mitigation is the core message conveyed.
Incorrect Options:
- Option A: We continue to depend on fossil fuels heavily
This statement describes a current challenge or a problem that the passage identifies as needing a "major shift" away from. While a significant issue, it represents the context or a barrier to be overcome, rather than the overarching essential message which focuses on the solution. - Option C: We must invest in research and development
The passage identifies investment in research and development as a critical component for developing technological solutions to harness renewable energy, thereby facilitating mitigation. However, this is presented as a specific strategy or means to achieve mitigation, not the fundamental message encompassing all aspects discussed. - Option D: People must change their lifestyle
The passage states that mitigation "requires changes in lifestyles" and gives the example of reducing animal protein consumption. This is highlighted as a crucial element for effective emission reduction, indicating that mitigation is not solely a technological fix. Nevertheless, it is one of several means to achieve the broader imperative of mitigation, rather than the essential message itself.