It is true that there was a time when the Earth's temperature was hotter than it is today and the concentration of carbon dioxide was higher. But never before has the environment changed so drastically. Rapid change is dangerous, as many people catch a cold at the turn of the season and the weak die.

According to reliable research results so far, the use of fossil fuels since the Industrial Revolution has led to the release of large quantities of carbon dioxide buried in the Earth's crust in large quantities as carbon dioxide, which is the biggest cause of global warming. I was thinking about contributing to solving this problem. And the answer was in the forest.