Fill in the blanks Least polluting fuel for vehicles is__________.

CNG

Vehicles powered by traditional fuels such as petrol and diesel emit harmful gases that contribute to air pollution and global warming. These gases include carbon dioxide (CO2), nitrogen oxides (NOx), carbon monoxide (CO), and particulate matter, all of which are detrimental to human health and the environment. These pollutants are primarily the result of incomplete combustion of fossil fuels, which release high levels of carbon into the atmosphere, contributing significantly to the greenhouse effect and the depletion of the ozone layer.

The greenhouse effect is a major contributor to global warming, where gases like CO2, methane (CH4), and nitrogen oxides trap heat in the Earth's atmosphere, raising its temperature. This leads to a host of environmental problems, such as rising sea levels, extreme weather patterns, and the melting of polar ice caps. The automotive industry, along with industrial emissions, is a significant source of these greenhouse gases.

To combat these environmental challenges, it is crucial to shift to cleaner fuels. Among the various alternatives available, Compressed Natural Gas (CNG) has emerged as the least polluting fuel for vehicles.