One way of mitigating the adverse effects of man-made climate change is to plant trees. The more trees there are, the more CO2 they absorb from the atmosphere, thereby alleviating the greenhouse effect because plants build their roots, stems and leaves from the CO2 they suck out of the air….

Splitting carbon dioxide into carbon monoxide and oxygen has been a challenge, especially doing so cheaply. Yet the process is key if we are to improve our use of renewable energy because it can help turn renewable energy into fuel directly without adding to the amount of CO2 in the…