"Green Peace activists within your nation are calling on the government to create a national Earth Day holiday. They claim that this holiday will serve to remind our citizens to appreciate their environment."

When I enacted the:

Option 1: Create the national Earth Day holiday to remind our citizens to protect the environment. 1 point of improvement to environment.

I did not see a corresponding increase in my nation's environment.

You probably already had the best environment possible and hence there was nothing left to improve. Environment scores of 1 plus GRL can not be improved further. You have 3 border walls and if they were used to improve your environment you can get rid of one.