By LucyCartwright / Getty images Feeding cats and dogs wet food has a much larger climate impact than dry food, a new study found, suggesting small changes by pet owners can massively reduce their carbon footprint. Feeding cats and dogs wet food has a much larger climate impact than dry food, a new study found, suggesting small changes by pet owners can massively reduce their carbon footprint. The Brazilian study looked at the environmental impact — including greenhouse gas emissions, land use and water usage — of pet food, finding that there was more than a seven-fold increase in CO2 produc…