A good example in the case of heating is the use of heat pumps and electrically driven heat pumps, which may be solar collectors in combination with heat pumps. They may reduce the greenhouse gas footprint of heating systems.
In the area of grain drying, I don't think we've really explored all the ways in which you can put drier air into grain other than just heating it—condensers and other things. Again, that's up to the technology experts to develop. Some of that will come as it becomes apparent that we need to find more greenhouse gas-efficient technologies.