International Elem...What???

1. They are going to use geothermal A/C, photovoltaic power systems, and rainwater collections.
2. Rain collections are just when they're going to have an instrument that collects the rain. Photovoltaic power systems are solar panels. And geothermal A/C is pipes underground taht gives them heat and air conditioning.
3. My choice is conservation and biodiversity.
4. The problem is that its threatned around the world by human expansions nad activities.
5. I would try and limit the amount of activites that threaten conservation and biodiversity. Such as, oil spills, pollution from factories, cars, and/or houses.