One of the hot-button issues affecting the future of our civilization is climate change driven by deforestation, greenhouse gas emissions, and poor infrastructure in developing countries around the world. Texas, California, and several other states achieved a milestone in 2019; generating more electricity from “alternative” energy sources like wind, solar, and nuclear than from carbon-emitting sources like coal plants.
You can base your submissions on the dangers of climate change/glacier loss/global warming/deforestation, etc... or you can promote clean energy; wind, solar, nuclear, geothermal, hydro.
Recycling, awareness, and alternatives to petrol in transportation (electric, biodiesel, and fuel cell solutions) are good subjects, as well as Earth awareness, arboriculture, and its relationship to carbons.