The problem is that we know that carbon dioxide is accumulating in the atmosphere at a significant rate. However, about 15% of the industrial emissions cannot really be realistically removed over the next 4 or 5 decades because there are many technologies that use high energy, density, fuel and they cannot be readily replaced with the alternative energy sources we currently have. Think about jetliners, ocean liners, etc. It is widely agreed that about 10%-15% of the emissions that exist today will exist over the coming decades, too. So there is a general, well understood need for actively capturing carbon dioxide from the atmosphere and sequestering it in a safe form. Most of the currently available solutions that capture carbon dioxide, whether it's a point source or from point source emission, use an energy intensive chemical filtration process so filters that need to be heated, and the end product is a gas phase, carbon dioxide, which is then usually injected deep underground being stored at high pressure. This is difficult to inventory, manage and store properly.