Earth Day, Then and Now: Finding Hope on the Frontlines of a Climate Crisis
By Dej Knuckey

On the first Earth Day in 1970, twenty million Americans gathered to protest pollution and industrial waste. No one was using the term “climate crisis” yet, but the biggest pollutants of all—greenhouse gases—were just beginning to take their toll.
Since then, the concentration of carbon dioxide in the atmosphere has risen from 325 to 430 parts per million, a powerful measure of how much the climate has changed in just over five decades.
Now we see the effects every day: The American Red Cross is responding to nearly twice as many large disasters as it did a decade ago.
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