Find out more about carbon sinks:

• Carbon Brief​ Explainer: 10 ways 'negative emissions' could slow climate change
• Nature.com: Pathways for Balancing CO2 Emissions and Sinks 

• Plant Hedges in congested city streets - plant trees in urban areas with lower buildings...
• ​Scientific America: Roadside Shrubs Could Sink Carbon Pollution
• It's all in the tree's! Benefits of Trees in Urban Areas