Ironically, people drilling bush is the biggest threat to the environment. Drilling bush leads to more people and overpopulation is the origin of all other environmental problems. Yeah, we can cut back the amount of energy each person uses so that everyone has to use dinky little electric cars and take less hot showers, but in 5 or 10 years the exponential growth of the gobal population will wipe out any of those gains. So yet another round of cutting per person energy use will have to take place until our standard of life is in a pathetic state where only the very wealthy will be able to have a warm home and travel further than walking distance.