Environment solutions in Western Europe need to 1.) extend beyond national boundaries
2.) understand conflicting uses for resources
3.) consider multiple viewpoints
4.). Confined by political borders

If you mean how the great lakes formed, then  the great lakes began to form at the end of the last glacial period 14,000 years  ago, ice sheets  retreated, which led to exposing the basins they had carved into land which then filled with melt-water.