As the U.S. Supreme Court heard oral arguments in the major climate lawsuit Suncor v. Boulder earlier this month, Western Slope rancher Kathryn Bedell prepared to sell off the last of her cattle herd. Bedell, a retired large animal veterinarian who has spent three decades grazing herds of up to 200 cattle in Mesa, Delta, Montrose and Grand counties, said amid the widespread drought on Colorado’s Western Slope, ranching just didn’t make economic …