Such is the power of mangroves, their carbon sequestration rate is an estimated 300kg over a 25 year growth period. Beyond the 25 years, mangroves stop absorbing CO2 but due to their unique root system it is locked away for millienia in the water-logged soil underneath.
12t is widely regarded as a conservative estimate of an average annual footprint in regions such as UK. Obviously everyone and every region is different but typically in the 9t to 15t range.
Funding 40 mangroves in a year sequesters the same amount of CO2 (over 25 years) as that being emitted by an annual carbon footprint of 12t.
However one side of the equation is putting harmful excess CO2 into the atmosphere with immediate effect, adding to global warming, whereas the other 'repairing' side happens gradually over 25 years. Eventually one catches up with the other to fully counterbalance, but our precious and struggling planet does not have this luxury of time on its side.
In the app, we provide an Impact Score indicator which attributes a carbon sequestration figure of 50kg per tree (rather than 300kg). 50kg is a conservate estimate of the mangrove tree's CO2 impact from seedling stage to year 2030, which is widely recognised as a critical tipping point for the planet.
Planting approx 250 mangrove trees in a year is estimated to have the sequestration impact of over 12t of CO2e by 2030. This coupled with focussing on reducing your annual carbon footprint at source will likely put you personally into a positive zone, plus contribute towards counterbalancing some of the inevitable excesses being caused by others.