‘Planetary boundaries’ identified in Nature study

By Cronkite News Service

Here are nine “planetary boundaries” identified by scientists in a study published in the journal Nature:

_ Climate change

_ Biodiversity loss

_ Nitrogen in the atmosphere and phosphorous in the oceans

_ Stratospheric ozone depletion

_ Ocean acidification

_ Global fresh water use

_ Change in land use

_ Atmosphere aerosol loading

_ Chemical pollution