That the proposal is just bare concrete seems completely inexplicable to me; not only is concrete ugly as sin, it's also hugely unfriendly to the environment in terms of CO2 production.
You're not familiar with Japan, are you? You may not be able to get a permit to cut down a tree in your yard, if you're lucky enough to have one, but they're perfectly happy to buy up every redwood tree they can convince someone to cut down on their behalf. They coat them in tar and sink them beneath the ocean. Mature redwoods are some of the world's most efficient fixers of CO2; a mature tree actually fixes more carbon than the equivalent mass of young trees, or the equivalent area coverage of same.
Japan gives not one tenth of one fuck about environmental impact, so long as it doesn't affect them, just like everyone else. And they seem to be incapable of recognizing that the things they are doing are doing that, just like everyone else.