From RealClimateScience
“In the Netherlands, CO2 from industries operating in the port of Rotterdam is transported to the nearby Westland area, where it is used as a literal greenhouse gas, to help stimulate the growth of vegetables.” — https://euobserver.com/environment/139726
sunshine hours 
“Nothing more than an accounting trick that does little to reduce emissions” — could just as well be the definition of many bio-fuels.
Yes.
At last. This is what Dr. Fr. Riedel envisioned in 1920:
http://tinyurl.com/1920sciamCO2