This Earth Day, President Joe Biden is convening a 40-country virtual climate change summit. As with the first Earth Day in 1970, a watershed moment that paved the way for fundamental environmental laws still with us today, we may see a coalition of environmentalists and industrialists come together. If so, let’s hope they produce the right policies.

In 1970, worries about water and air quality motivated the movement. Today, it’s largely climate change, carbon emissions, and rising sea levels. Back then, mounting a federal effort was the challenge. Today, the issue is global, which means getting world governments to agree on one thing.

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