Comments on: Planting 1.2 Trillion Trees Could Cancel Out a Decade of CO2 Emissions, Scientists Find https://lifeboat.com/blog/2019/04/planting-1-2-trillion-trees-could-cancel-out-a-decade-of-co2-emissions-scientists-find Safeguarding Humanity Tue, 30 Apr 2019 14:00:35 +0000 hourly 1 https://wordpress.org/?v=6.6.1 By: Stefaan Dondeyne https://lifeboat.com/blog/2019/04/planting-1-2-trillion-trees-could-cancel-out-a-decade-of-co2-emissions-scientists-find#comment-366264 Tue, 30 Apr 2019 14:00:35 +0000 https://lifeboat.com/blog/2019/04/planting-1-2-trillion-trees-could-cancel-out-a-decade-of-co2-emissions-scientists-find#comment-366264 Where will we find the area for all those trees?
• 1.2 trillion trees = 1.2 * 10^12 trees
• If we plant these at 10 m x 10 m (that is dense for large trees) = 10000 trees/km² ( or 100 trees/ha);
• So we need 1.2 * 10^12 / 10^4 km² = 1.2 × 10^8 km² of land;
• The whole planet earth is 5.1 × 10^8 km², of which 3.4 × 10^8 km² is ocean/sea;
• So of the 1.7 × 10^8 km² of land, we will need 1.2 × 10^8 km² for planting these additional trees, that is 71% of all land … (where shal we live? what about the existing forest? marshes, … ?)

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