Kaibab deer, 175f

Kalundborg, Denmark, 132f

Keeling, Charles, 415

Keller, Jeff, 362

Kelly, Erin, 374

Kent, Peter, 481f

kerogen shale, 372

keystone species, 188, 188f, 244

Keystone XL pipeline, 374, 379

Kirschenmann, Fred, 319

Korvela, Michael, 189f

Kouser, Shahzad, 308

Krach, Raquel, 318

Krebs, Charles, 169

K-selected species

characteristics of, 168f

definition, 169

population changes in, 168

K-T boundary mass extinction, 210

kwashiorkor, 302f

Kyoto Protocol, 422, 480–482

coolant factories and, 484–485

fossil fuels and, 482

gases regulated under, 483

successes of, 483–484