As engineers make decisions on how resources are allocated, used, and disposed in pursuit of a product, they impact sustainability's triple bottom line of social, environmental, and economic factors. Design for Environment (DfE) principles help engineers identify possible sustainable paths forward. We collected over 300 DfE principles from 29 different sources, including textbooks, academic references, and industry resources on sustainable design. We coded each principle according to where it impacts the Product Lifecycle, and which Sustainability Impacts it addresses. Future work includes eliciting additional DfE principles for sparse categories, and developing DfE tools to inform sustainable decision making.