"environmental impact assessments must be conducted by well-regulated, impartial professionals"- easier said that done- because inevitably it's not just about pure science- value systems are relevant. Accounting is much easier since it's closer to being a real science with less need to ponder value systems- it's all about tracking the money. But trade offs are necessary when considering any changes to the environment from development. This subject of trade offs is worth a major study in order to become more aware of what's gained and what's lost.