Step 1: Reduce your negative environmental impact.

How? By RETHINKING and REDUCING your consumption. By actively choosing to pollute less.

Step 2: Improve your positive environmental impact.

How? By planting a tree (or two or three).

There's no denying that some environmentally harmful activities are hard to avoid. Air travel has become a big part of life (for most of us), and a big threat to the environment (for all of us). Check out our calculator below to understand how many CO2-inhaling trees it takes to remove the pollution from flying. And next time you are high in the sky, we hope you'll consider putting roots in the ground.

声明：
为了保证结果为整数，我们作了如下调整： 1. 在计算之后，如果最终结果少于一棵树（如：0.6棵树），我们会把结果归为1棵树；
2. 如果结果大于1棵树，我们将采取四舍五入（如：9.2棵树=9棵树；6.8棵树=7棵树）。