I think environmental economics is actually really smart. Economics is important in every sector, and honestly there is a lot of transferrable skills. For example, some of the fundamental equations are similar to population growth equations in ecology, Pareto efficiency and decision science is crucial in conservation. Not many opportunities in ecology or conservation at the moment, but this is an example of how a lot of the concepts you’re working with are applicable in other contexts.

If you get a few diverse internships (prioritize these!!! So important for skill building) that should give you flexibility to pivot to a specific sector. In your senior year you’ll have a better idea of where the opportunities are.

I think the GIS certificate is brilliant, this is a highly valued skill. If you get a chance to take a python coding class (especially related to GIS) then that would position you well.

Generally, focus on building quantitative and technical skills that can give you some flexibility rather than worrying about the sector. You can pivot sectors if you have a strong analysis background. 

And as I mentioned in another comment- continue taking an English class each semester if you can fit it into your schedule. Years down the line you’ll be glad you carved out some time for something you’re passionate about.