Why I'd rather be a tree hugger than a hedge funder

Telegraph
"The harmless trace gas carbon dioxide, as any halfway literate scientist knows, is plant food – not a pollutant. That's why in agricultural greenhouses commercial growers often raise CO2 levels to between 700 ppm (parts per million) and 1,000 ppm – which is more than twice current atmospheric CO2 levels of (approx) 392 ppm. They do this because they know CO2 increases plants' growth rate while simultaneously reducing the amount of water they require. ....."