Two general classifications
Carbon Dioxide Removal Carbon Dioxide Removal (CDR) techniques, which remove CO2 from the atmosphere, absorbing terrestrial radiation (longwave radiation). As they address the root cause of climate change, rising CO2 concentrations, they have relatively low uncertainties and risks and have an effect on controlling greenhouse gases. However, these techniques work slowly to reduce global temperatures. Besides, CDR is pretty expensive.
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| Solar Radiation Management Solar Radiation Management (SRM) techniques, which reflect a small percentage of the sun's light and heat(shortwave radiation) back into space. These methods act quickly, and so may represent the only way to lower global temperatures quickly in the event of a climate crisis. However, they only reduce some, but not all, effects of climate change, while possibly creating other problems. They also do not affect CO2 levels and therefore fail to address the wider effects of rising CO2, including ocean acidification. In the financial aspect, SRM is relatively cheap. |
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