> restoring whales population to their pre-industrial levels could have the same effect as planting several billion trees. I would like to see the maths on tha

> restoring whales population to their pre-industrial levels could have the same effect as planting several billion trees. I would like to see the maths on that :D Whales usually don't create their own microclimate or provide a habit for a number of species. They also don't rebuild and support topsoil, can't be harvested for fibres and are not very suitable as building materials. In other words, trees are more versatile than whales.