The idea behind net zero is to stop adding planet-warming gas to the atmosphere, either by preventing the emissions in the first place or removing an equivalent amount through natural or technological means. Scientists say the world needs to reach net-zero emissions by 2050 to limit global warming to 1.5 degrees Celsius (2.7 degrees Fahrenheit) compared with pre-industrial times.
The net-zero goal has gained traction in recent years. While 149 countries have such targets, up from 124 in late 2020, the number of publicly listed corporations aiming for net zero increased from 417 to 929, according to the Net Zero Stocktake report compiled by experts from four independent research organizations.
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