1. Use the alternative energy sources of wind, geothermal and concentrated solar power to replace coal power. How many wedges can be realistically removed from the projected emissions graph? What is the total number of wedges that have now been removed from the graph?
2. How many wedges are removed from the projected carbon emissions graph if all 49 000 000 km2 of Earth’s farmland is farmed with conservation tillage techniques? Can this change remove the wedge and a quarter that remains?