This graph, based on the comparison of atmospheric samples contained in ice cores and more recent direct measurements, provides evidence that atmospheric CO2 has increased since the Industrial Revolution. (Credit: Vostok ice core data/J.R. Petit et al.; NOAA Mauna Loa CO2 record.) Find out more about ice cores (external site).
The Earth’s climate has changed throughout history. Just in the last 650,000 years there have been seven cycles of glacial advance and retreat, with the abrupt end of the last ice age about 7,000 years ago marking the beginning of the modern climate era — and of human civilization. Most of these climate changes are attributed to very small variations in Earth’s orbit that change the amount of solar energy our planet receives.
Scientific evidence for warming of the climate system is unequivocal.
The Civil Rights movement of the 60's and 70's provided David with his introduction to the pacific resistance and social activism of the Mahatma Gandhi and Dr. Martin Luther King. Understandings and beliefs now long dormant and his commitment to those teachings guide his renewed activism with Transylvania Indivisible today. His determination to provide his son and grandson with a chance to live the American Dream drive his ongoing passion for change.