The air pollution that people in Colorado inhale each day comes from myriad sources: factories, cars, buildings and homes, fossil fuel facilities, cattle feedlots.
If, as a number of Sierra readers suggested, population is the elephant in the room, then our addiction to fossil fuels is a Tyrannosaurus rex about to devour us all.
"The physical effects of climate change, population growth, and urbanisation mean that without effective action more Australians' livelihoods will be impacted by disasters into the future and the cost of those disasters will continue to grow."
Water frozen at the tops of mountains that helps sustain up to a quarter of the human population is under threat from climate change, population growth and lack of proper management, according to a new international study.
Promoting contraceptives in fun ways achieved tremendous success towards breaking taboos and clarifying misconceptions. Together with creative community development programs, family planning programs increased the wellbeing of all Thais.
"Climate change, human population growth, exploitation of natural resources, and habitat loss all pose major threats to the precious balance of our natural world," he said.
High fertility is driven by a number of factors including desired family size, low levels of use of modern contraceptives, and high levels of adolescent childbearing.
The brain-harming metal is discharged directly into the river and carried to it on air currents. Some argue authorities are doing too little to stop both routes of pollution.
