We Have An Atmosphere That Is Roughly

We Have An Atmosphere That Is Roughly 21% Oxygen. The Rest Of It Is Largely Nitrogen. There's Just Enough Carbon Dioxide (co2) To Drive Photosynthesis. That Has Been, Throughout The History Of Our Species, Pretty Stable. Until Recently.

We Are Not Only Warming The Ocean And The Planet As A Whole, But We Are Also Acidifying The Ocean And Changing Its Chemistry.

Earth As An Ecosystem Stands Out In The All Of The Universe. There's No Place That We Know About That Can Support Life As We Know It, Not Even Our Sister Planet, Mars, Where We Might Set Up Housekeeping Someday, But At Great Effort And Trouble We Have To Recreate The Things We Take For Granted Here.

Childcare Is A Huge Issue For Young Women Whose Work May Require Them To Leave Their Families For Weeks At A Time.

In The Past Few Decades, Earth's Natural Systems Have Endured More Pressure Than In All Preceding Human History.