Why did Republicans vote against the States' Environmental Rights Amendment?

The environment effects more than just one state, it effects the nation as a whole. A state strapped for cash could plunder their national resources at the cost of destroying their state. Or, dam up a river which would effect other states. What would happen if Colorado dammed up their river at the boarder of Utah? Or, Virginia chopped down all their trees for lumber? There are some things that the country as a whole needs to be in unison.