[teshier-A]

Take a look at this experiment in Siberia : https://en.wikipedia.org/wiki/Pleistocene_Park

>The aim of the project is to research the climatic effects of the expected changes in the ecosystem. Here the hypothesis is that the change from tundra to grassland will result in a raised ratio of energy emission to energy absorption of the area, leading to less thawing of permafrost and thereby less emission of greenhouse gases.[8][9] It is also thought that removal of snow by large herbivores will further reduce the permafrost's insulation.

>To study this, large herbivores have been released, and their effect on the local fauna is being monitored. Preliminary results point at the ecologically low-grade tundra biome being converted into a productive grassland biome and at the energy emission of the area being raised.[10]